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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#161
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Posted to rec.audio.tech,sci.electronics.basics,sci.electronics.components,sci.electronics.repair,sci.engr.television.advanced
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![]() Peter Wieck = CRIMINAL ****wit YANK **** ** Just ignore the above totally autistic YANK psychopath. The basic truths about CFLs are all documented here. The public is being massively LIED to by all involved. Much of the info on the page below is my material. http://sound.westhost.com/articles/incandescent.htm ........ Phil |
#162
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Posted to rec.audio.tech,sci.electronics.basics,sci.electronics.components,sci.electronics.repair,sci.engr.television.advanced
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On Jun 29, 10:45 am, "Phil Allison" wrote:
Much of the info on the page below is my material. Phil: You are proud of this? It is as cogent, accurate and thoughtful as your manners are fit for polite society. Just like knowledge, a little truth badly distorted is a very dangerous thing. There is a school of thought that fanatics are the worst possible advocates for a cause as they are ideologically unable to accept anything that is counter to their closely held beliefs. You are a fanatic, and no help to your cause as anything looks reasonable by comparison. Peter Wieck Wyncote, PA |
#163
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Posted to rec.audio.tech,sci.electronics.basics,sci.electronics.components,sci.electronics.repair,sci.engr.television.advanced
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![]() Peter Wieck = CRIMINAL ****wit YANK MORON ** Just ignore the above, totally autistic YANK psychopath. The basic truths about CFLs are all documented here. The public is being massively LIED to by all involved. Much of the info on the page below is my material. http://sound.westhost.com/articles/incandescent.htm ........ Phil |
#164
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Posted to rec.audio.tech,sci.electronics.basics,sci.electronics.components,sci.electronics.repair,sci.engr.television.advanced
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Eeyore wrote:
If the central heating is on, then you are, by definition, needing extra heat. The heat output from lighting will mean that the room thermostat (or radiator valves) will turn off that bit sooner. Not really. The heat from most lamps hangs around at ceiling level. It does sod all to warm a room. Wrong. |
#165
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Posted to rec.audio.tech,sci.electronics.basics,sci.electronics.components,sci.electronics.repair,sci.engr.television.advanced
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![]() dizzy wrote: Eeyore wrote: If the central heating is on, then you are, by definition, needing extra heat. The heat output from lighting will mean that the room thermostat (or radiator valves) will turn off that bit sooner. Not really. The heat from most lamps hangs around at ceiling level. It does sod all to warm a room. Wrong. Not wrong. Graham |
#166
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Posted to rec.audio.tech,sci.electronics.basics,sci.electronics.components,sci.electronics.repair,sci.engr.television.advanced
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![]() "Eeysore ASD retarded MORON" dizzy wrote: The heat from most lamps hangs around at ceiling level. It does sod all to warm a room. Wrong. Not wrong. ** Its a whole lot worse that just wrong. It is massively asinine, autistic ****wit think. The only kind the Graham Stevenson menace ever does. ........ Phil |
#167
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Posted to rec.audio.tech,sci.electronics.basics,sci.electronics.components,sci.electronics.repair,sci.engr.television.advanced
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Eeyore wrote:
dizzy wrote: Eeyore wrote: If the central heating is on, then you are, by definition, needing extra heat. The heat output from lighting will mean that the room thermostat (or radiator valves) will turn off that bit sooner. Not really. The heat from most lamps hangs around at ceiling level. It does sod all to warm a room. Wrong. Not wrong. Graham Then you've never been in a TV studio, Donkey. -- Service to my country? Been there, Done that, and I've got my DD214 to prove it. Member of DAV #85. Michael A. Terrell Central Florida |
#168
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Posted to rec.audio.tech,sci.electronics.basics,sci.electronics.components,sci.electronics.repair,sci.engr.television.advanced
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![]() "Michael A. Terrell" wrote in message ... Eeyore wrote: If the central heating is on, then you are, by definition, needing extra heat. The heat output from lighting will mean that the room thermostat (or radiator valves) will turn off that bit sooner. Not really. The heat from most lamps hangs around at ceiling level. It does sod all to warm a room. Wrong. Not wrong. Then you've never been in a TV studio Hey you're both partly right. As it generates heat, it will add *something* to the room temperature. But if the fitting is at ceiling height, and since hot air rises, it is not an efficient way to warm the part of the room that humans inhabit. And if you don't have ceiling insulation, it will do even less. It's normally considered far better to place electric radiant heaters at floor level, and relatively close to humans. Of course the radiant heat from studio lamps is far greater than normal domestic bulbs, but I wouldn't want to be paying for the electricity they use either. Even bathroom heat lamps are mirror backed to project the heat downwards, and they are a pretty inefficient heating method regardless. Fortunately they are only designed to be used for short periods. MrT. |
#169
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Posted to rec.audio.tech,sci.electronics.basics,sci.electronics.components,sci.electronics.repair,sci.engr.television.advanced
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Eeyore wrote in
: dizzy wrote: Eeyore wrote: If the central heating is on, then you are, by definition, needing extra heat. The heat output from lighting will mean that the room thermostat (or radiator valves) will turn off that bit sooner. Not really. The heat from most lamps hangs around at ceiling level. It does sod all to warm a room. Wrong. Not wrong. Graham Yes it is. Most of the heat is radiant. Just because the intensity falls off fourfold per unit distance doesn't mean the energy vanishes. Even if you consider the ceiling covering nearly half of the volume through which heat tries to radiate through, the shallow angle of incidence means that most of that reflects to join the rest to warm the walls and anything else it can reach. The small amount of heat above the lamp is from convection, and keeping the bulb clean will help to let the heat radiate more efficiently and usefully. Cieling heat isn't useless in heating a room anyway. While I think it IS a bit daft, I remember a house I visited a few times as a kid, it had a low temperature heater in the entire ceiling of one room. It was very low-grade heat, but it still warned the room. I felt it on my face when I looked up at it. Less so while sitting, but not much, because the area was so large. Similarly, a lightbulb radiating across a ceiling adds heat usefully to the whole room. More in fact (proportionally), because more of it is radiated than conducted away above. |
#170
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Posted to rec.audio.tech,sci.electronics.basics,sci.electronics.components,sci.electronics.repair,sci.engr.television.advanced
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"Mr.T" MrT@home wrote in
u: It's normally considered far better to place electric radiant heaters at floor level, and relatively close to humans. It is, and it's not wise. It places stresses on the body, strong enough to make it ill. I remember getting into the strong localised heat one winter. I ended up shivering if I moved away to another room, even if moving out of the direct radiance. Going outside felt terrible. I had headaches and flu- like symptoms. It was one of the more stupid experiments I ever tried. It's far better to live with a well-spread heat source that doesn't cause strong changes. That way the body can maintain thermal equilibrium and stay safe, the immune system strengthens, and going outside is an easy extension of internal activity. It makes it easier to get used to wider extremes. If I have to use a radiant heater, I point it at distant furnishings at low level but not at me. Most times I now rely on convection and low-grade radiation from electrical devices, relying on their waste heat and on good home insulation but also good ventilation. In short, anything that produces heat but no strong thermal gradients. I've found it the most healthy way to get heating done. A single strong lamp in the centre of the ceiling fits into that well enough. |
#171
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Posted to rec.audio.tech,sci.electronics.basics,sci.electronics.components,sci.electronics.repair,sci.engr.television.advanced
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![]() "Michael A. Terrell" wrote: Eeyore wrote: dizzy wrote: Eeyore wrote: If the central heating is on, then you are, by definition, needing extra heat. The heat output from lighting will mean that the room thermostat (or radiator valves) will turn off that bit sooner. Not really. The heat from most lamps hangs around at ceiling level. It does sod all to warm a room. Wrong. Not wrong. Then you've never been in a TV studio, Donkey. It's a hell of a lot hotter up where the lamps are. Besides, TV spotlights are hardly a valid comparison with ordinary domestic lighting. Graham |
#172
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Posted to rec.audio.tech,sci.electronics.basics,sci.electronics.components,sci.electronics.repair,sci.engr.television.advanced
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![]() "Mr.T" wrote: Even bathroom heat lamps are mirror backed to project the heat downwards, and they are a pretty inefficient heating method regardless. Fortunately they are only designed to be used for short periods. I have one of those. It's quite nice in the winter. Graham |
#173
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Posted to rec.audio.tech,sci.electronics.basics,sci.electronics.components,sci.electronics.repair,sci.engr.television.advanced
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Phil Allison wrote:
Homes in Australia are mostly all electric. Not true in the US. ** So ****ing what ? God you stinking YANKS are so ****ing parochial. Actually, I think that this is a bit hypocritical. Australia is VERY UNUSUAL in having a lot of very cheap coal-generated electricity, so cheap that in Australia the general public does not even recognise that resistive electric heating is stupid. In most developed countries, the cost of electricity is higher and therefore more efficient methods of heating (such as heat pumps or even just burning fossil fuel directly in the house - and avoiding the pathetic 35% efficiency of power stations) - are much more common. If the low efficiency and consequent heat generation of filament bulbs ie an "advantage" to you, then exactly how low would you like the efficiency to be, for the ideal light bulb? Perhaps you could paint half of the bulb black, to reduce the efficiency further, in you "better" bulb, and fit a black lamp shade, and wear sunglasses....Then you could install ten times more wattage of lamps and your lighting would be ideal... I agree with some of your other criticisms of at least some CFLs, and I think that a ban on incandescent bulbs is stupid, but this idea that the low efficiency (and consequent heat generation) of incandescent bulbs is a good thing just doesn't make sense. Oh, and being rude won't make you right, by the way. Chris |
#174
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Posted to rec.audio.tech,sci.electronics.basics,sci.electronics.components,sci.electronics.repair,sci.engr.television.advanced
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"Mr.T" wrote:
"Michael A. Terrell" wrote in message Then you've never been in a TV studio Hey you're both partly right. As it generates heat, it will add *something* to the room temperature. But if the fitting is at ceiling height, and since hot air rises, it is not an efficient way to warm the part of the room that humans inhabit. And if you don't have ceiling insulation, it will do even less. Military TV station in Alaska in the early '70s: Halogen studio lights at the ceiling, and less than half in use at any one time. In the winter I would open the back door to the studio to allow the sub zero air into the studio to keep it below 80 degrees. In the summer, the talking heads did the news in a dress uniform shirt and jacket, and their underwear, because there was no air conditioning. It's normally considered far better to place electric radiant heaters at floor level, and relatively close to humans. Of course the radiant heat from studio lamps is far greater than normal domestic bulbs, but I wouldn't want to be paying for the electricity they use either. Newer studio cameras need less light than the older models. That reduces studio operating costs, and mantainenece costs, as well. Even bathroom heat lamps are mirror backed to project the heat downwards, and they are a pretty inefficient heating method regardless. Fortunately they are only designed to be used for short periods. Its stupid NOT to have a reflector on any ceiling mounted lamp. When it comes to studio lighting, there are different types of fixtues to choose from. The choice depends on the lighting pattern that is required. Also, small studio spotlights are used with brass Gobos to project patterens on the studio walls. The last custom one I made was a Shamrock, for an Irish preacher, who was visiting WACX TV. http://www.sfxdesigninc.com/v2/ for examples of stock Gobos. -- Service to my country? Been there, Done that, and I've got my DD214 to prove it. Member of DAV #85. Michael A. Terrell Central Florida |
#175
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Posted to rec.audio.tech,sci.electronics.basics,sci.electronics.components,sci.electronics.repair,sci.engr.television.advanced
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![]() "Eeyore" wrote in message ... You need at least a 23W CFL to match the output of a 100W incandescent. Ony for a good one at the start of it's life. They get even dimmer with use though. The table here... http://en.wikipedia.org/wiki/Incandescent_lamp#Power Shows a 100W incandescent providing 1700 lumens. In comparison some new CFLs I have claim only 1100 lumens for an 18W and 1200 lumens for a 20W. The 11W CFLs claim 600 lumens and that makes them only slightly brighter than a standard 40W bulb instead of equivalent to a 60W as claimed. I do wish they wouldn't make these silly claims for them. Me too, and those equally silly 8,000 hour claims. MrT. |
#176
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Posted to rec.audio.tech,sci.electronics.basics,sci.electronics.components,sci.electronics.repair,sci.engr.television.advanced
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![]() "Mr.T" wrote: "Eeyore" wrote You need at least a 23W CFL to match the output of a 100W incandescent. Ony for a good one at the start of it's life. They get even dimmer with use though. The table here... http://en.wikipedia.org/wiki/Incandescent_lamp#Power Shows a 100W incandescent providing 1700 lumens. In comparison some new CFLs I have claim only 1100 lumens for an 18W and 1200 lumens for a 20W. The 11W CFLs claim 600 lumens and that makes them only slightly brighter than a standard 40W bulb instead of equivalent to a 60W as claimed. I do wish they wouldn't make these silly claims for them. Me too, and those equally silly 8,000 hour claims. I haven't been counting the precise hours but the ones I've had have lasted a long, long time. Graham |
#177
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Posted to rec.audio.tech,sci.electronics.basics,sci.electronics.components,sci.electronics.repair,sci.engr.television.advanced
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![]() "Michael A. Terrell" wrote in message ... Military TV station in Alaska in the early '70s: Halogen studio lights at the ceiling, and less than half in use at any one time. In the winter I would open the back door to the studio to allow the sub zero air into the studio to keep it below 80 degrees. In the summer, the talking heads did the news in a dress uniform shirt and jacket, and their underwear, because there was no air conditioning. Its stupid NOT to have a reflector on any ceiling mounted lamp. When it comes to studio lighting, there are different types of fixtues to choose from. The choice depends on the lighting pattern that is required. Also, small studio spotlights are used with brass Gobos to project patterens on the studio walls. The last custom one I made was a Shamrock, for an Irish preacher, who was visiting WACX TV. http://www.sfxdesigninc.com/v2/ for examples of stock Gobos. And the relevence to the current discussion is ..... ???????? MrT. |
#178
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Posted to rec.audio.tech,sci.electronics.basics,sci.electronics.components,sci.electronics.repair,sci.engr.television.advanced
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![]() "Eeyore" wrote in message ... I do wish they wouldn't make these silly claims for them. Me too, and those equally silly 8,000 hour claims. I haven't been counting the precise hours but the ones I've had have lasted a long, long time. 120V, or 240V like we have here? Mine never last a year, standard fluoro tubes however last for 10 years or more. I know which I prefer! MrT. |
#179
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Posted to rec.audio.tech,sci.electronics.basics,sci.electronics.components,sci.electronics.repair,sci.engr.television.advanced
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![]() "Mr.T" MrT@home wrote in message u... "Eeyore" wrote in message ... I do wish they wouldn't make these silly claims for them. Me too, and those equally silly 8,000 hour claims. I haven't been counting the precise hours but the ones I've had have lasted a long, long time. 120V, or 240V like we have here? Mine never last a year, standard fluoro tubes however last for 10 years or more. I know which I prefer! MrT. The only difference between 120V and 240V CFLs is the configuration of the rectifier and filter capacitor(s) on the input. Some are crap and fail quickly, others last years. Start cycles seems to have a large effect on life, the ones that are in dusk till dawn lights outdoors have lasted me to or beyond their rated life, save for one that failed in the first couple weeks. Full size fluorescent tubes do last a long time, though the ballast is the reason for most of this. CFL ballasts are just not robust, they're built to be disposable. |
#180
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Posted to rec.audio.tech,sci.electronics.basics,sci.electronics.components,sci.electronics.repair,sci.engr.television.advanced
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![]() "Eeyore" wrote in message ... In Australia the "reputable makes" are simply rebadged Chinese **** as well. Are you sure you are not simply being fooled as well? I'd like to know if you've tried a Philips CFL. Why don't you read what I have already written then? IF you CAN read this, I will repeat once again, I have tried MANY Phillips badged CFL's, of at least 3 different types. NONE were any bloody good, one was DOA brand new! You're welcome to come collect it and test it for yourself! :-) I'm NOT buying any more of their overpriced ****e. MrT. |
#181
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Posted to rec.audio.tech,sci.electronics.basics,sci.electronics.components,sci.electronics.repair,sci.engr.television.advanced
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![]() "James Sweet" wrote in message news:t5Ihi.2134$DM4.1499@trndny06... The only difference between 120V and 240V CFLs is the configuration of the rectifier and filter capacitor(s) on the input. Which do fail. Some are crap and fail quickly, others last years. Never had one that lasted "years", and I've used dozens. 12-18 months is the best I've had, zero being the worst. Start cycles seems to have a large effect on life, Of course, and turning off lights when not in use saves more power than leaving CFL's on. the ones that are in dusk till dawn lights outdoors have lasted me to or beyond their rated life, save for one that failed in the first couple weeks. Wow, and how much power can you save by turning them off? My outdoor lights are solar powered. Full size fluorescent tubes do last a long time, though the ballast is the reason for most of this. CFL ballasts are just not robust, they're built to be disposable. Not all. I did buy a two part CFL once, and when the tube failed, no replacements are available. Back to standard tubes for me! MrT. |
#182
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Posted to rec.audio.tech,sci.electronics.basics,sci.electronics.components,sci.electronics.repair,sci.engr.television.advanced
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![]() "James Sweet" wrote in message The only difference between 120V and 240V CFLs is the configuration of the rectifier and filter capacitor(s) on the input. ** Where do fools like Sweet get this ******** from ?? 120 volt and 240 volt CFLs drive circuits mostly have the very similar topology. The tubes for the latter simply run at half the current of the former. See for 120 volt CFLs. http://www.repairfaq.org/sam/cflamp1.pdf http://www.repairfaq.org/sam/cflamp2.pdf See for 240 volt CFLs. http://www.pavouk.org/hw/lamp/en_index.html All 14 shown use a bridge rectifier at the AC input. ] ........ Phil |
#183
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Posted to sci.electronics.repair
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![]() "Phil Allison" wrote in message ... "James Sweet" wrote in message The only difference between 120V and 240V CFLs is the configuration of the rectifier and filter capacitor(s) on the input. ** Where do fools like Sweet get this ******** from ?? 120 volt and 240 volt CFLs drive circuits mostly have the very similar topology. The tubes for the latter simply run at half the current of the former. See for 120 volt CFLs. http://www.repairfaq.org/sam/cflamp1.pdf http://www.repairfaq.org/sam/cflamp2.pdf See for 240 volt CFLs. http://www.pavouk.org/hw/lamp/en_index.html All 14 shown use a bridge rectifier at the AC input. Interesting, those are different than most of the ones I've torn apart which had a voltage doubler with a pair of identical filter caps, these are mostly older though. Either way the tube current is determined by characteristics of the tube and most of a given diameter are about the same. Input voltage does not determine tube current, the design of the ballast does, in the case of the first one, the inductor L2 is primarily responsible for limiting lamp current to something reasonable. Getting rid of that crossposting crap, makes me wonder if any newsreaders can warn when crossposting so I don't have to remember to check. |
#184
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Posted to rec.audio.tech,sci.electronics.basics,sci.electronics.components,sci.electronics.repair,sci.engr.television.advanced
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On 2007-07-01, Eeyore wrote:
"Mr.T" wrote: "Eeyore" wrote I do wish they wouldn't make these silly claims for them. Me too, and those equally silly 8,000 hour claims. I haven't been counting the precise hours but the ones I've had have lasted a long, long time. I'm just onto my second set of CFLs (GE) in the living room. I estimate the first set (Osram, 23W, bought at great expense some eight years ago), lasted for between 7,300 and 8,800 hours of actual use. The Osram 23W in the kitchen is original and eight years old. It doesn't do so many hours but it does get switched on and off very frequently. So I am not convinced of the argument I occasionally see that on/off cycles kill CFLs. -- John Phillips |
#185
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Posted to rec.audio.tech,sci.electronics.basics,sci.electronics.components,sci.electronics.repair,sci.engr.television.advanced
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![]() "John Phillips" The Osram 23W in the kitchen is original and eight years old. It doesn't do so many hours but it does get switched on and off very frequently. So I am not convinced of the argument I occasionally see that on/off cycles kill CFLs. ** It kills the ones that are designed to start and reach full output very quickly. The heaters are run hotter in them and have high initial current levels. Many independent tests have been done to verify the destructive effect of many short cycles and it IS true. ........ Phil |
#186
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Posted to rec.audio.tech,sci.electronics.basics,sci.electronics.components,sci.electronics.repair,sci.engr.television.advanced
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![]() "Mr.T" wrote: "Eeyore" wrote I do wish they wouldn't make these silly claims for them. Me too, and those equally silly 8,000 hour claims. I haven't been counting the precise hours but the ones I've had have lasted a long, long time. 120V, or 240V like we have here? 240V. Mine never last a year, standard fluoro tubes however last for 10 years or more. I know which I prefer! The years depend on hours use per day of course but I have some that are used a lot of the time (hall lighting for example) and I've had several years use from them. Maybe around 3 years. Graham |
#187
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Arfa Daily wrote in message
... "Eeyore" wrote in message ... Serge Auckland wrote: "Don Pearce" wrote Eeyore wrote You need at least a 23W CFL to match the output of a 100W incandescent. The table here... http://en.wikipedia.org/wiki/Incandescent_lamp#Power Shows a 100W incandescent providing 1700 lumens. In comparison some new CFLs I have claim only 1100 lumens for an 18W and 1200 lumens for a 20W. The 11W CFLs claim 600 lumens and that makes them only slightly brighter than a standard 40W bulb instead of equivalent to a 60W as claimed. I do wish they wouldn't make these silly claims for them. I noticed that from the start. They never stood up to the brightness claims they made about them, but it isn't even just that. There is something dingy in the quality of light that isn't fixed by going up in power. That's pretty much my (or at least, my wife's) view. She can't stand the light they give, much prefers halogens for reading and incandescents for background lighting. Ths was part of the reason why I was trying to find out if converting to CFLs would really help reduce energy use, or just move the energy equation from UK electricity use at home to Chinese energy usage in the factory, which is most likely produced from dirtier sources. So far, I haven't seen any reliable figures for end-to-end engy usage on CFLs, just consumption and lifetime. A 23W CFL will save 462 kWh over a 100W incandescent during a typical low end 6000 hour lifetime. Adjust upwards for 12,000 and 15,000 hour examples. There's no question of simply 'exporting pollution'. Also, don't forget to factor in the energy to make anywhere between 6 and 15 incandescent bulbs for every CFL. Graham But also factor in the many more processes and transport movements to make that one CFL. The PCB material has to be made. That then has to be shipped to a PCB manufacturer, and from there to the lamp manufacturer. All of the components on the PCB have to be made and shipped, and the materials to make *them* made and shipped. Just think of an electrolytic cap for instance, There's aluminium, steel, nickel, copper, rubber, paper, acid. Switching tranny has copper, ferrite, steel, nickel, glue. Semicons have similar metals plus silicon plus doping agents plus plastic. Every one of those items has it's own manufacturing processes, spread all over the world, all using energy, and no doubt creating their own pollutants. Plus workers that have to be transported to and from a factory that has to be kept warm ( or air-co'd ) and lit. They also have to be fed whilst they are there. Each transport operation is another inefficient energy user, as the weight of the transporting vehicle has to be shifted every time, as well as the load it is carrying. Shifting the weight of a ship or aircraft is significant compared to the weight of cargo it carries. Once all of those parts have arrived at Philips or wherever, then they have to be assembled up into a CFL. I don't really see how this whole process doesn't constitute "exporting pollution" ?? Also factor in the 'proper' recycling that is going to have to be done in order for them to comply with the WEEE directive which already exists, but for some reason, does not seem to be being applied to these devices at this time. Clearly, the energy budget calculation for the manufacturing, lifetime use, and disposal of these CFLs is very complex and probably almost impossible to actually do with any accuracy but, when it comes down to it, I'm willing to bet that there would not actually be much in it when compared to manufacturing, using and disposing of 10 incandescents with their very limited materials, processes and transport counts. Unfortunately, these lamps are just another example of eco-hype, where it is very easy to fool the average punter ( and politician, it would seem ) with a bit of pseudo science regarding their apparent 'green' credentials with regard to power consumption and lifetime. I don't dispute that they have their place, and in pure terms of how much money they are going to take out of my pocket in running costs, they almost certainly win over incandescents. However, as others have mentioned, the light that they produce is not very pleasant to 'use', nor is it very decorative, no matter how the manufacturers mix up the phosphors to try to match the colour temperature of an incandescent. Also, as Don says, where the useage period is short, and there is not enough time for them to warm up properly, or where instant full light is required, as when entering a room in the dark, they are less than satisfactory. This problem is exacerbated in Northern Europe winters, where it is both dark AND cold ... Arfa The colour supplement http://www.guardian.co.uk/weekend/0,,180242,00.html of this paper on Saturday had pictures( p5 5,38,39 )of the end result of those otherwise empty shipping containers going back to the east and WEEE directive. For little more than the admin costs they can fill the containers with our e-waste. Mountains of CRTs , circuit boards having been heat stripped of components , lead and tin and dumped in the Indian countryside. -- Diverse Devices, Southampton, England electronic hints and repair briefs , schematics/manuals list on http://home.graffiti.net/diverse:graffiti.net/ |
#188
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#189
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In article , Mr.T wrote:
"Eeyore" wrote in message ... You need at least a 23W CFL to match the output of a 100W incandescent. Ony for a good one at the start of it's life. They get even dimmer with use though. The table here... http://en.wikipedia.org/wiki/Incandescent_lamp#Power Shows a 100W incandescent providing 1700 lumens. I see 1710, 1730 and 1750 on packages having "standard" incandescents, as low as 1670 for 750 hour soft white. The lowest wattage CFLs I have seen produce 1700-plus lumens are the Philips 25 watt SLS (1750 lumens) and 26 watt spirals. In comparison some new CFLs I have claim only 1100 lumens for an 18W and 1200 lumens for a 20W. I think some 18 watt ones produce 1200 lumens. A standard 75W incandescent (120V 750 hour) produces 1190-1210 lumens. So optimistically an 18W CFL in new condition will match that. The 11W CFLs claim 600 lumens and that makes them only slightly brighter than a standard 40W bulb instead of equivalent to a 60W as claimed. I do wish they wouldn't make these silly claims for them. They're probably comparing to an industrial service 60W incandescent, which does indeed produce only about 600 lumens. In my experience, a 13W CFL in new condition matches a 60W standard incandescent when things are going well for the CFL. The usual actual "standard incandescent" equivalences of CFLs in new condition: 9W spiral - 40 watts 13W spiral - optimistically 60 watts 15W spiral - 60 watts fairly easily 18-20W spirals - 75 watts 23 watt spirals - between 75 and 100, good to perform as well as a 75 after they have aged or are running at non-optimum temperature. 25 watt Philips and 26 watt spirals - 100 watts 30 watt spirals - 100 watts after aging or when temperature is non-optimum Me too, and those equally silly 8,000 hour claims. That is for 3 hours per start in a 25 degree C ambient. This is the actual industry standard for fluorescents. I think that a more appropriate one for incandescent-replacement CFLs should be 1 hour per start in a 40 degree C ambient. Meanwhile, I do have CFLs normally last a few thousand hours. - Don Klipstein , http://www.misty.com/~don/cfx.html) |
#190
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Posted to rec.audio.tech,sci.electronics.basics,sci.electronics.components,sci.electronics.repair,sci.engr.television.advanced
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In article , Mr.T wrote:
"James Sweet" wrote in message news:t5Ihi.2134$DM4.1499@trndny06... The only difference between 120V and 240V CFLs is the configuration of the rectifier and filter capacitor(s) on the input. Which do fail. Some are crap and fail quickly, others last years. Never had one that lasted "years", and I've used dozens. 12-18 months is the best I've had, zero being the worst. I had plenty last a few thousand actual operating hours, some that get switched more maybe 2,000-3,000. Most of mine lasted a few years. Start cycles seems to have a large effect on life, Of course, and turning off lights when not in use saves more power than leaving CFL's on. the ones that are in dusk till dawn lights outdoors have lasted me to or beyond their rated life, save for one that failed in the first couple weeks. Wow, and how much power can you save by turning them off? My outdoor lights are solar powered. Full size fluorescent tubes do last a long time, though the ballast is the reason for most of this. CFL ballasts are just not robust, they're built to be disposable. Not all. I did buy a two part CFL once, and when the tube failed, no replacements are available. Was that a Lights of America product? I have noticed a lot of complaints about them. A few are for making products that require proprietary bulbs that they since discontinued. More are for life/reliability issues and for falling short of claimed light output. If it was not LOA, then chances are the tubes are industry standard ones with replacements of GE, Philips, and Osram/Sylvania being available. Look in home centers, hardwares stores, and electrical/lighting supply shops. Back to standard tubes for me! The standard ones are superior. CFLs are mainly for retrofitting incandescent fixtures or for use in small fixtures of size like that of incandescent fixtures. - Don Klipstein ) |
#191
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Posted to sci.electronics.basics,sci.electronics.components,sci.electronics.repair
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![]() "Eeyore" wrote in message ... "Mr.T" wrote: "Eeyore" wrote You need at least a 23W CFL to match the output of a 100W incandescent. Ony for a good one at the start of it's life. They get even dimmer with use though. The table here... http://en.wikipedia.org/wiki/Incandescent_lamp#Power Shows a 100W incandescent providing 1700 lumens. In comparison some new CFLs I have claim only 1100 lumens for an 18W and 1200 lumens for a 20W. The 11W CFLs claim 600 lumens and that makes them only slightly brighter than a standard 40W bulb instead of equivalent to a 60W as claimed. I do wish they wouldn't make these silly claims for them. Me too, and those equally silly 8,000 hour claims. I haven't been counting the precise hours but the ones I've had have lasted a long, long time. Graham I've had ones that I counted the lifespan in seconds. Burned out before I got off the ladder when replacing them.... -- Ed |
#192
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Posted to sci.electronics.basics,sci.electronics.components,sci.electronics.repair
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![]() "GPE". I've had ones that I counted the lifespan in seconds. Burned out before I got off the ladder when replacing them.... ** Had one do just that on me recently - it lasted about 3 seconds. Returned it to the store for replacement and the staffer moaned that I had opened the packet !! BTW Be sure NEVER to put one in a socket that operates from a dimmer, no matter that it may be kept set at maximum - it will still fry the CFL's electronics. See this page, about half way through, under "Normal" CFL Failure Modes. http://sound.westhost.com/articles/incandescent.htm ......... Phil |
#193
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Posted to sci.electronics.basics,sci.electronics.components,sci.electronics.repair
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![]() "Phil Allison" "GPE". Be sure NEVER to put one in a socket that operates from a dimmer, no matter that it may be kept set at maximum - it will still fry the CFL's electronics. See this page, about half way through, under "Normal" CFL Failure Modes. http://sound.westhost.com/articles/incandescent.htm ** Also see pic of scope trace of incredibly spiky AC current draw - figure 12 near the end of the page. ......... Phil |
#194
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Posted to sci.electronics.repair
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![]() Was that a Lights of America product? I have noticed a lot of complaints about them. A few are for making products that require proprietary bulbs that they since discontinued. More are for life/reliability issues and for falling short of claimed light output. LOA is usually pure junk. The curious thing I've noticed about them is that at least in the past, they used top quality Japanese tubes with about the cheapest most junky Chinese ballasts I've ever seen. I don't think I ever had one of the ballasts last long enough to wear out a tube so the replaceable aspect is not really worth much. |
#195
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Posted to sci.electronics.basics,sci.electronics.components,sci.electronics.repair
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![]() GPE wrote: "Eeyore" wrote "Mr.T" wrote: "Eeyore" wrote You need at least a 23W CFL to match the output of a 100W incandescent. Ony for a good one at the start of it's life. They get even dimmer with use though. The table here... http://en.wikipedia.org/wiki/Incandescent_lamp#Power Shows a 100W incandescent providing 1700 lumens. In comparison some new CFLs I have claim only 1100 lumens for an 18W and 1200 lumens for a 20W. The 11W CFLs claim 600 lumens and that makes them only slightly brighter than a standard 40W bulb instead of equivalent to a 60W as claimed. I do wish they wouldn't make these silly claims for them. Me too, and those equally silly 8,000 hour claims. I haven't been counting the precise hours but the ones I've had have lasted a long, long time. I've had ones that I counted the lifespan in seconds. Burned out before I got off the ladder when replacing them.... That's certainly never happned to me. Were they 'off-brand' cheapies by any chance. Graham |
#196
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Posted to rec.audio.tech,sci.electronics.basics,sci.electronics.components,sci.electronics.repair,sci.engr.television.advanced
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On Sun, 01 Jul 2007 06:05:11 GMT, Eeyore
wrote: "Mr.T" wrote: "Eeyore" wrote You need at least a 23W CFL to match the output of a 100W incandescent. Ony for a good one at the start of it's life. They get even dimmer with use though. The table here... http://en.wikipedia.org/wiki/Incandescent_lamp#Power Shows a 100W incandescent providing 1700 lumens. In comparison some new CFLs I have claim only 1100 lumens for an 18W and 1200 lumens for a 20W. The 11W CFLs claim 600 lumens and that makes them only slightly brighter than a standard 40W bulb instead of equivalent to a 60W as claimed. I do wish they wouldn't make these silly claims for them. Me too, and those equally silly 8,000 hour claims. Most of the CFL's I have installed make it to 9000 hours. I mark the "in service" date on the base body. I have a few lamps that run 24/7 that repeatedly make it to rated time. I have also had a number of DOA's (dead from the start) and a number that failed in the first 30 days. Note: in all cases, CFL's were installed in open fixtures and NOT on dimmers (or electronic timers). Some long service time failures were spectacular (lots of smoke). Non-CFL (AKA regular fluorescent) have starter failures that are more frequent than CFL failures. These lamps are in locations that are not suitable for CFL (Closed fixtures, High/low temperatures) , Yard lights, Bathroom fan and Attic crawl spaces. I haven't been counting the precise hours but the ones I've had have lasted a long, long time. Graham |
#197
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Posted to rec.audio.tech,sci.electronics.basics,sci.electronics.components,sci.electronics.repair,sci.engr.television.advanced
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#198
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Posted to rec.audio.tech,sci.electronics.basics,sci.electronics.components,sci.electronics.repair,sci.engr.television.advanced
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Steve Urbach wrote:
I have had good luck with LOA and terrible longevity issues with Feit in the same service location. So far I've had nothing but Feit 23W CFLs and I'm averaging 2-1/2 years on a bulb. Don't think any lasted less than two years. -- Happy Birthday, Canada! July 1, 1867 - July 1, 2007 In honor of Canada's birthday, all Canadians are directed to spend Sunday in their birthday suits. |
#199
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Posted to rec.audio.tech,sci.electronics.basics,sci.electronics.components,sci.electronics.repair,sci.engr.television.advanced
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![]() "Eeyore" wrote in message ... Mine never last a year, standard fluoro tubes however last for 10 years or more. I know which I prefer! The years depend on hours use per day of course but I have some that are used a lot of the time (hall lighting for example) and I've had several years use from them. Maybe around 3 years. Which is still a hell of a lot less than I get from standard fluoro tubes. And I think my observations are more directly comparable for my applications. You can use whatever works for you. MrT. |
#200
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Posted to rec.audio.tech,sci.electronics.basics,sci.electronics.components,sci.electronics.repair,sci.engr.television.advanced
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![]() "Don Klipstein" wrote in message ... I see 1710, 1730 and 1750 on packages having "standard" incandescents, as low as 1670 for 750 hour soft white. The lowest wattage CFLs I have seen produce 1700-plus lumens are the Philips 25 watt SLS (1750 lumens) and 26 watt spirals. But even then not for their full life expectency unfortunately. 30 watt spirals - 100 watts after aging or when temperature is non-optimum And they seem to be both hard to obtain, and expensive. And since the wattage is approx 1/3rd, the savings are less than claimed. Me too, and those equally silly 8,000 hour claims. That is for 3 hours per start in a 25 degree C ambient. This is the actual industry standard for fluorescents. I think that a more appropriate one for incandescent-replacement CFLs should be 1 hour per start in a 40 degree C ambient. 40degC ambient??? Is that how you get the claimed life expectency, no wonder I never do. Meanwhile, I do have CFLs normally last a few thousand hours. And I still dream of even getting that much. I guess it will happen one day. MrT. |
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