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Fact or Fiction - LEDs don’t produce heat
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Fact or Fiction - LEDs donÂ’t produce heat
Spalted Walt wrote: We report, you decide. http://www.ledsmagazine.com/articles...duce-heat.html https://en.wikipedia.org/wiki/Therma...igh-power_LEDs Ok, So it seems that LEDS waste about 70% of the energy that they consume and that energy becomes heat. Unless they are IR LEDs In so much that the typical LED, and all of the ones I have purchased, use 10% or much less energy than a comparable incandescent light I have not witnessed any heat at all. My sampling has included 3-4 ribbons of LEDs, multiple strings of LED Christmas lights all plugged into each other, and a couple of out door 60 watt incandescent coach lights replaced with equivalency light out put LED bulbs. The biggest consumers of electricity of this sampling is 7 watts and even those might only be producing about 1/3 the amount of heat of a typical 7 watt incandescent light bulb. Show me a single LED that consumed 180 watts by itself and I think it, the LED itself and not the transformer or other involved electronics, will get hot enough to equal a common 60 watt incandescent light bulb. |
Fact or Fiction - LEDs don?t produce heat
On Mon, 9 May 2016 06:37:55 -0500, Leon wrote:
Spalted Walt wrote: We report, you decide. http://www.ledsmagazine.com/articles...duce-heat.html https://en.wikipedia.org/wiki/Therma...igh-power_LEDs Ok, So it seems that LEDS waste about 70% of the energy that they consume and that energy becomes heat. Unless they are IR LEDs In so much that the typical LED, and all of the ones I have purchased, use 10% or much less energy than a comparable incandescent light I have not witnessed any heat at all. My sampling has included 3-4 ribbons of LEDs, multiple strings of LED Christmas lights all plugged into each other, and a couple of out door 60 watt incandescent coach lights replaced with equivalency light out put LED bulbs. The biggest consumers of electricity of this sampling is 7 watts and even those might only be producing about 1/3 the amount of heat of a typical 7 watt incandescent light bulb. Show me a single LED that consumed 180 watts by itself and I think it, the LED itself and not the transformer or other involved electronics, will get hot enough to equal a common 60 watt incandescent light bulb. You will need more sensitve equipment than your fingers to actually measure the heat produced. If you wanted to argue about it someone could, but not me. |
Fact or Fiction - LEDs don?t produce heat
Leon wrote:
Show me a single LED that consumed 180 watts by itself and I think it, the LED itself and not the transformer or other involved electronics, will get hot enough to equal a common 60 watt incandescent light bulb. 100 watt LED gets VERY hot, very quickly. https://www.youtube.com/watch?v=CIBIqaeiE2M https://www.youtube.com/watch?v=CxnP-6EZ3ZQ |
Fact or Fiction - LEDs don?t produce heat
On 5/9/2016 6:50 AM, Markem wrote:
On Mon, 9 May 2016 06:37:55 -0500, Leon wrote: Spalted Walt wrote: We report, you decide. http://www.ledsmagazine.com/articles...duce-heat.html https://en.wikipedia.org/wiki/Therma...igh-power_LEDs Ok, So it seems that LEDS waste about 70% of the energy that they consume and that energy becomes heat. Unless they are IR LEDs In so much that the typical LED, and all of the ones I have purchased, use 10% or much less energy than a comparable incandescent light I have not witnessed any heat at all. My sampling has included 3-4 ribbons of LEDs, multiple strings of LED Christmas lights all plugged into each other, and a couple of out door 60 watt incandescent coach lights replaced with equivalency light out put LED bulbs. The biggest consumers of electricity of this sampling is 7 watts and even those might only be producing about 1/3 the amount of heat of a typical 7 watt incandescent light bulb. Show me a single LED that consumed 180 watts by itself and I think it, the LED itself and not the transformer or other involved electronics, will get hot enough to equal a common 60 watt incandescent light bulb. You will need more sensitve equipment than your fingers to actually measure the heat produced. If you wanted to argue about it someone could, but not me. Well, I just checked an 60 W equivalent LED in the kitchen and it gets warm around the base. However, when I found a 60 W incandescent it didn't take but about a minute to get too hot to touch. Checking the card a replacement in the drawer is on it says that the 60 W equivalent LED uses 9.5 W. So the answer to the original question, whether LEDs produce heat, is yes. But they produce much less heat than incandescents. I don't expect that a small LED would produce enough heat to be easily detectable by hand. Bill |
Fact or Fiction - LEDs don?t produce heat
On 5/9/2016 6:50 AM, Markem wrote:
On Mon, 9 May 2016 06:37:55 -0500, Leon wrote: Spalted Walt wrote: We report, you decide. http://www.ledsmagazine.com/articles...duce-heat.html https://en.wikipedia.org/wiki/Therma...igh-power_LEDs Ok, So it seems that LEDS waste about 70% of the energy that they consume and that energy becomes heat. Unless they are IR LEDs In so much that the typical LED, and all of the ones I have purchased, use 10% or much less energy than a comparable incandescent light I have not witnessed any heat at all. My sampling has included 3-4 ribbons of LEDs, multiple strings of LED Christmas lights all plugged into each other, and a couple of out door 60 watt incandescent coach lights replaced with equivalency light out put LED bulbs. The biggest consumers of electricity of this sampling is 7 watts and even those might only be producing about 1/3 the amount of heat of a typical 7 watt incandescent light bulb. Show me a single LED that consumed 180 watts by itself and I think it, the LED itself and not the transformer or other involved electronics, will get hot enough to equal a common 60 watt incandescent light bulb. You will need more sensitve equipment than your fingers to actually measure the heat produced. If you wanted to argue about it someone could, but not me. LOL.. which is why I mentioned that If my fingers feel no heat at all there for the most part the LEDs that I have used produce no appreciable heat. I measure heat this way. I feel nothing, I feel a little warmth, I feel something hot that I don't want to touch. The 7 watt single bulbs get a little warm where the ballast/transformer is located near the screw in base but the bulb itself only gets warm when the sun shines on it. I leave these lights on 24/7 also. |
Fact or Fiction - LEDs don?t produce heat
On 5/9/2016 7:43 AM, Spalted Walt wrote:
Leon wrote: Show me a single LED that consumed 180 watts by itself and I think it, the LED itself and not the transformer or other involved electronics, will get hot enough to equal a common 60 watt incandescent light bulb. 100 watt LED gets VERY hot, very quickly. https://www.youtube.com/watch?v=CIBIqaeiE2M https://www.youtube.com/watch?v=CxnP-6EZ3ZQ Well even a blind hog.....LOL |
Fact or Fiction - LEDs don?t produce heat
On Monday, May 9, 2016 at 9:42:06 AM UTC-4, Leon wrote:
On 5/9/2016 7:43 AM, Spalted Walt wrote: Leon wrote: Show me a single LED that consumed 180 watts by itself and I think it, the LED itself and not the transformer or other involved electronics, will get hot enough to equal a common 60 watt incandescent light bulb. 100 watt LED gets VERY hot, very quickly. https://www.youtube.com/watch?v=CIBIqaeiE2M https://www.youtube.com/watch?v=CxnP-6EZ3ZQ Well even a blind hog.....LOL I think a detailed spreadsheet is in order...any volunteers? :) |
Fact or Fiction - LEDs don?t produce heat
On 5/9/2016 7:43 AM, Spalted Walt wrote:
Leon wrote: Show me a single LED that consumed 180 watts by itself and I think it, the LED itself and not the transformer or other involved electronics, will get hot enough to equal a common 60 watt incandescent light bulb. 100 watt LED gets VERY hot, very quickly. So does a 60 watt incandescent blub. LEDs with equivalent light output of common home incandescent lights do not. https://www.youtube.com/watch?v=CIBIqaeiE2M https://www.youtube.com/watch?v=CxnP-6EZ3ZQ |
Fact or Fiction - LEDs don?t produce heat
On Mon, 9 May 2016 08:37:12 -0500, Leon lcb11211@swbelldotnet wrote:
On 5/9/2016 6:50 AM, Markem wrote: On Mon, 9 May 2016 06:37:55 -0500, Leon wrote: Spalted Walt wrote: We report, you decide. http://www.ledsmagazine.com/articles...duce-heat.html https://en.wikipedia.org/wiki/Therma...igh-power_LEDs Ok, So it seems that LEDS waste about 70% of the energy that they consume and that energy becomes heat. Unless they are IR LEDs In so much that the typical LED, and all of the ones I have purchased, use 10% or much less energy than a comparable incandescent light I have not witnessed any heat at all. My sampling has included 3-4 ribbons of LEDs, multiple strings of LED Christmas lights all plugged into each other, and a couple of out door 60 watt incandescent coach lights replaced with equivalency light out put LED bulbs. The biggest consumers of electricity of this sampling is 7 watts and even those might only be producing about 1/3 the amount of heat of a typical 7 watt incandescent light bulb. Show me a single LED that consumed 180 watts by itself and I think it, the LED itself and not the transformer or other involved electronics, will get hot enough to equal a common 60 watt incandescent light bulb. You will need more sensitve equipment than your fingers to actually measure the heat produced. If you wanted to argue about it someone could, but not me. LOL.. which is why I mentioned that If my fingers feel no heat at all there for the most part the LEDs that I have used produce no appreciable heat. I measure heat this way. I feel nothing, I feel a little warmth, I feel something hot that I don't want to touch. The 7 watt single bulbs get a little warm where the ballast/transformer is located near the screw in base but the bulb itself only gets warm when the sun shines on it. I leave these lights on 24/7 also. Well, I can tell you a 60 watt LED array produces enough (radiant) heat that you can feel it 5 feet away. (LED aircraft landing / taxi lighting). 10 WATTS PRODUCES ABOUT 30000 CANDELLA AND 1000 LUMENS. So imagine 60 watts!!!!!!! |
Fact or Fiction - LEDs don?t produce heat
Leon lcb11211@swbelldotnet wrote:
On 5/9/2016 7:43 AM, Spalted Walt wrote: Leon wrote: Show me a single LED that consumed 180 watts by itself and I think it, the LED itself and not the transformer or other involved electronics, will get hot enough to equal a common 60 watt incandescent light bulb. 100 watt LED gets VERY hot, very quickly. So does a 60 watt incandescent blub. LEDs with equivalent light output of common home incandescent lights do not. Not surprising considering an A19 60W equiv LED consumes 8 - 9.5W and produces no IR. |
Fact or Fiction - LEDs don?t produce heat
Leon lcb11211@swbelldotnet wrote:
On 5/9/2016 7:43 AM, Spalted Walt wrote: Leon wrote: Show me a single LED that consumed 180 watts by itself and I think it, the LED itself and not the transformer or other involved electronics, will get hot enough to equal a common 60 watt incandescent light bulb. 100 watt LED gets VERY hot, very quickly. https://www.youtube.com/watch?v=CIBIqaeiE2M https://www.youtube.com/watch?v=CxnP-6EZ3ZQ Well even a blind hog.....LOL Another 100W LED 'blind hog' dealing with the heat: https://www.youtube.com/watch?v=jaJQ2fo4poU |
Fact or Fiction - LEDs don?t produce heat
On Mon, 9 May 2016 06:37:55 -0500, Leon wrote:
Spalted Walt wrote: We report, you decide. http://www.ledsmagazine.com/articles...duce-heat.html https://en.wikipedia.org/wiki/Therma...igh-power_LEDs Ok, So it seems that LEDS waste about 70% of the energy that they consume and that energy becomes heat. Unless they are IR LEDs In so much that the typical LED, and all of the ones I have purchased, use 10% or much less energy than a comparable incandescent light I have not witnessed any heat at all. My sampling has included 3-4 ribbons of LEDs, multiple strings of LED Christmas lights all plugged into each other, and a couple of out door 60 watt incandescent coach lights replaced with equivalency light out put LED bulbs. The biggest consumers of electricity of this sampling is 7 watts and even those might only be producing about 1/3 the amount of heat of a typical 7 watt incandescent light bulb. Show me a single LED that consumed 180 watts by itself and I think it, the LED itself and not the transformer or other involved electronics, will get hot enough to equal a common 60 watt incandescent light bulb. Exploding LED lights https://www.youtube.com/watch?v=CUTUa8Ngt-M https://www.youtube.com/watch?v=CsZWNM1Iuig When bread boarding LED's I have burnt my fingers more than once on an over driven LED, the bulbs can take more than the ribbon stuff does. Just thought I'd throw this into the conversation. |
Fact or Fiction - LEDs don?t produce heat
On Mon, 9 May 2016 08:37:12 -0500, Leon lcb11211@swbelldotnet wrote:
On 5/9/2016 6:50 AM, Markem wrote: On Mon, 9 May 2016 06:37:55 -0500, Leon wrote: Spalted Walt wrote: We report, you decide. http://www.ledsmagazine.com/articles...duce-heat.html https://en.wikipedia.org/wiki/Therma...igh-power_LEDs Ok, So it seems that LEDS waste about 70% of the energy that they consume and that energy becomes heat. Unless they are IR LEDs In so much that the typical LED, and all of the ones I have purchased, use 10% or much less energy than a comparable incandescent light I have not witnessed any heat at all. My sampling has included 3-4 ribbons of LEDs, multiple strings of LED Christmas lights all plugged into each other, and a couple of out door 60 watt incandescent coach lights replaced with equivalency light out put LED bulbs. The biggest consumers of electricity of this sampling is 7 watts and even those might only be producing about 1/3 the amount of heat of a typical 7 watt incandescent light bulb. Show me a single LED that consumed 180 watts by itself and I think it, the LED itself and not the transformer or other involved electronics, will get hot enough to equal a common 60 watt incandescent light bulb. You will need more sensitve equipment than your fingers to actually measure the heat produced. If you wanted to argue about it someone could, but not me. LOL.. which is why I mentioned that If my fingers feel no heat at all there for the most part the LEDs that I have used produce no appreciable heat. I measure heat this way. I feel nothing, I feel a little warmth, I feel something hot that I don't want to touch. The 7 watt single bulbs get a little warm where the ballast/transformer is located near the screw in base but the bulb itself only gets warm when the sun shines on it. I leave these lights on 24/7 also. The worst LED bulbs I have used were the C9 replacement for night lights. It melted the plastic fixture, so they went in file 13. |
Fact or Fiction - LEDs don?t produce heat
On 5/9/2016 10:32 AM, Spalted Walt wrote:
Leon lcb11211@swbelldotnet wrote: On 5/9/2016 7:43 AM, Spalted Walt wrote: Leon wrote: Show me a single LED that consumed 180 watts by itself and I think it, the LED itself and not the transformer or other involved electronics, will get hot enough to equal a common 60 watt incandescent light bulb. 100 watt LED gets VERY hot, very quickly. https://www.youtube.com/watch?v=CIBIqaeiE2M https://www.youtube.com/watch?v=CxnP-6EZ3ZQ Well even a blind hog.....LOL Another 100W LED 'blind hog' dealing with the heat: https://www.youtube.com/watch?v=jaJQ2fo4poU Understood but none of the mega LEDs are anywhere near a home lighting fixture. |
Fact or Fiction - LEDs don_t produce heat
On Mon, 09 May 2016 10:34:46 +0000
Spalted Walt wrote: We report, you decide. they produce heat will they get to 451 farenheit is what wood workers wanna know what do the data sheets say at digikey |
Fact or Fiction - LEDs don?t produce heat
Leon lcb11211@swbelldotnet wrote:
Understood but none of the mega LEDs are anywhere near a home lighting fixture. I agree 100%. Leon wrote: Show me a single LED that consumed 180 watts by itself and I think it, the LED itself and not the transformer or other involved electronics, will get hot enough to equal a common 60 watt incandescent light bulb. |
Fact or Fiction - LEDs don_t produce heat
Electric Comet wrote:
On Mon, 09 May 2016 10:34:46 +0000 Spalted Walt wrote: We report, you decide. they produce heat will they get to 451 farenheit is what wood workers wanna know what do the data sheets say at digikey http://www.cree.com/led-components-a.../XLampXML2.pdf |
Fact or Fiction - LEDs don_t produce heat
On Mon, 9 May 2016 11:20:27 -0700, Electric Comet
wrote: On Mon, 09 May 2016 10:34:46 +0000 Spalted Walt wrote: We report, you decide. they produce heat will they get to 451 farenheit is what wood workers wanna know No, but they don't have to get even close to that hot, to burn your house down. what do the data sheets say at digikey |
Fact or Fiction - LEDs don_t produce heat
On Mon, 09 May 2016 10:34:46 +0000
Spalted Walt wrote: We report, you decide. also leds can damage your eyes make sure and check the data sheets |
Fact or Fiction - LEDs don_t produce heat
Electric Comet wrote:
also leds can damage your eyes So can the sun, yet I find it usefull. http://machinedesign.com/blog/3-myth...ounding-leds-0 http://eyebulletin.com/study-says-th...mage-the-eyes/ |
Fact or Fiction - LEDs don_t produce heat
On Wed, 11 May 2016 18:03:57 +0000
Spalted Walt wrote: http://machinedesign.com/blog/3-myth...ounding-leds-0 http://eyebulletin.com/study-says-th...mage-the-eyes/ lets get a group of physicists and engineers together and have them stare into some leds for a few hours just to prove to us how harmless they are |
Fact or Fiction - LEDs don_t produce heat
On 5/11/2016 3:38 PM, Electric Comet wrote:
On Wed, 11 May 2016 18:03:57 +0000 Spalted Walt wrote: http://machinedesign.com/blog/3-myth...ounding-leds-0 http://eyebulletin.com/study-says-th...mage-the-eyes/ lets get a group of physicists and engineers together and have them stare into some leds for a few hours just to prove to us how harmless they are Or better yet, let's get some research to find out where the statement that LEDs can damage your eyes came from. What documented danger is there? Bill |
Fact or Fiction - LEDs don_t produce heat
On Thu, 12 May 2016 08:09:36 -0500, Bill Gill
wrote: On 5/11/2016 3:38 PM, Electric Comet wrote: On Wed, 11 May 2016 18:03:57 +0000 Spalted Walt wrote: http://machinedesign.com/blog/3-myth...ounding-leds-0 http://eyebulletin.com/study-says-th...mage-the-eyes/ lets get a group of physicists and engineers together and have them stare into some leds for a few hours just to prove to us how harmless they are Or better yet, let's get some research to find out where the statement that LEDs can damage your eyes came from. What documented danger is there? Let us see, an over current driven LED can pop and spread plastic shrapnel.... next |
Fact or Fiction - LEDs don_t produce heat
On Thu, 12 May 2016 08:09:36 -0500
Bill Gill wrote: Or better yet, let's get some research to find out where the statement that LEDs can damage your eyes came from. What documented danger is there? conduct your own get some leds and stare into them |
Fact or Fiction - LEDs don_t produce heat
On 5/12/16 7:09 AM, Bill Gill wrote:
On 5/11/2016 3:38 PM, Electric Comet wrote: On Wed, 11 May 2016 18:03:57 +0000 Spalted Walt wrote: http://machinedesign.com/blog/3-myth...ounding-leds-0 http://eyebulletin.com/study-says-th...mage-the-eyes/ lets get a group of physicists and engineers together and have them stare into some leds for a few hours just to prove to us how harmless they are Or better yet, let's get some research to find out where the statement that LEDs can damage your eyes came from. What documented danger is there? Bill Not based on digging up any document, but high intensity LEDs produce light in the ultra violet (UV) portion of the spectrum (more efficient). The change to visible light occurs in the phosphors used to cover the LEDs. The primary difference between manufacturers devices lies in this proprietary mix which determines the color and CRI. The coating also needs to not degrade and withstand the intense heat. Cheap coatings can fail, exposing the intense UV light. Phillips makes some A19 style bulbs with this coating on the outer glass, away from the LED in the center. Some of the bulb 'tear downs' (where they examine the quality of the components remark on how nasty the exposed LED looks with this outer glass removed. I doubt a fully exposed LED would cause immediate damage like with a laser, but it is similar to arc welding without proper eye protection. -BR |
Fact or Fiction - LEDs don_t produce heat
On 5/12/16 7:09 AM, Bill Gill wrote:
On 5/11/2016 3:38 PM, Electric Comet wrote: On Wed, 11 May 2016 18:03:57 +0000 Spalted Walt wrote: http://machinedesign.com/blog/3-myth...ounding-leds-0 http://eyebulletin.com/study-says-th...mage-the-eyes/ lets get a group of physicists and engineers together and have them stare into some leds for a few hours just to prove to us how harmless they are Or better yet, let's get some research to find out where the statement that LEDs can damage your eyes came from. What documented danger is there? Bill Just to be complete: http://www.cree.com/~/media/Files/Cr..._EyeSafety.pdf Of course many of these warnings are CYA statements. -BR |
Fact or Fiction - LEDs don_t produce heat
Some LEDS have UV light. That can strain eyes.
They mix colors in the unit to balance color. Color is based on the physical thickness between layers in semi. Red was easy - large structure. Blue was tough. had to be small and special dopant. The blue might have some UV in it. The tough ones - I have detected lasers used as LEDS. That is a problem. They put them in diffusion lenses but small beams are dangerous. Martin On 5/12/2016 8:09 AM, Bill Gill wrote: On 5/11/2016 3:38 PM, Electric Comet wrote: On Wed, 11 May 2016 18:03:57 +0000 Spalted Walt wrote: http://machinedesign.com/blog/3-myth...ounding-leds-0 http://eyebulletin.com/study-says-th...mage-the-eyes/ lets get a group of physicists and engineers together and have them stare into some leds for a few hours just to prove to us how harmless they are Or better yet, let's get some research to find out where the statement that LEDs can damage your eyes came from. What documented danger is there? Bill |
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