Just seen for sale light bulbs for the house, each one consisting of 15 of
those LEDs. They are going for about £6 each and are rated at 2500 hours
lifespan.

Anyone any experience of these....advantages and disadvantages?

"john eastwood" wrote in message
...
Just seen for sale light bulbs for the house, each one consisting of 15 of
those LEDs. They are going for about £6 each and are rated at 2500 hours
lifespan.

Are you sure that you've not missed a 0 off the end.

LEDs are supposed to last for years, even with regular use.

What type of fitting are they?

tim

On Mon, 24 Jan 2011 10:17:40 -0000, john eastwood wrote:

Just seen for sale light bulbs for the house, each one consisting of 15
of those LEDs. They are going for about £6 each and are rated at 2500
hours lifespan.

Anyone any experience of these....advantages and disadvantages?

Well yer bog standard tungsten bulb generally has a 2,000 hour life
so sick squid for an extra 500 hours is not very economic...

Sure you don't mean 25,000 hours, most specs I see for LED lamps
quote around 50,000 hours.

--
Cheers
Dave.

tim.... ) wibbled on Monday 24 January 2011 10:42:


"john eastwood" wrote in message
...
Just seen for sale light bulbs for the house, each one consisting of 15
of
those LEDs. They are going for about �6 each and are rated at 2500 hours
lifespan.

Are you sure that you've not missed a 0 off the end.

LEDs are supposed to last for years, even with regular use.

No so with the ones in lamp applications. They run hot which shortens the
life considerably. How long depends on whther they used decent quality LEDs
(eg Nichia, Luxeon, Cree and a couple of others) or some ****e cheap chinese
rubbish.

My experience with anything costing 6 quid involving LEDs has been the
latter - watch them start to burn out one by one after a month or two.

Cheaps LEDs are even worse than cheap CFLs...

What type of fitting are they?

tim

--
Tim Watts

In article ,
"john eastwood" writes:
Just seen for sale light bulbs for the house, each one consisting of 15 of
those LEDs. They are going for about £6 each and are rated at 2500 hours
lifespan.

Anyone any experience of these....advantages and disadvantages?

Well, you've given almost no info on what you're talking about but at
£6, almost certainly completely useless.

You have to get up nearer £100 to get anything viable at the moment.

--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]

On Mon, 24 Jan 2011 17:08:51 -0000, john eastwood
wrote:

you have given no information about the £100 one...for a house light
bulb ??

This Osram 12W LED (claimed 60W equivalent) is over £50 including VAT:

http://www.thelightbulb.co.uk/produc...osram-parathom

It claims 25000 hours life (not 2500). What's the advantage of LED over
CFL (given that the efficiencies and lifetimes are similar) that might
persuade somebody to pay that much?

Richard.
http://www.rtrussell.co.uk/

On Mon, 24 Jan 2011 18:04:20 -0000, Tim Streater
wrote:

When you press the switch, the light comes on.

Some CFLs reach full brightness nearly instantly (we've got one in our
downstairs loo and you don't really notice any delay).

Richard.
http://www.rtrussell.co.uk/

"Richard Russell" wrote in message newsp.vptrl4vgn5ksl5@richard...
On Mon, 24 Jan 2011 18:04:20 -0000, Tim Streater wrote:

When you press the switch, the light comes on.

Some CFLs reach full brightness nearly instantly (we've got one in our downstairs loo and you don't really notice any delay).

Richard.
http://www.rtrussell.co.uk/

I've got some cheap candle CFLs in the hall and I swear when you switch them on, the room
actually goes darker!

--
Graham.

%Profound_observation%

In article ,
"john eastwood" writes:

"Andrew Gabriel" wrote in message
...
In article ,
"john eastwood" writes:
Just seen for sale light bulbs for the house, each one consisting of 15
of
those LEDs. They are going for about £6 each and are rated at 2500 hours
lifespan.

Anyone any experience of these....advantages and disadvantages?

Well, you've given almost no info on what you're talking about but at
£6, almost certainly completely useless.

You have to get up nearer £100 to get anything viable at the moment.

you can get a six led torch from the 99p shop, and this is only three times
as many leds.

you have given no information about the £100 one...for a house light bulb ??

That's why you don't see them in houses. You will find them in some
commercial premises where the cost of a light fitting (even an expensive
one) is often insignificant compared with the total cost of the
refurbishment.

Basically, I'm just saying the price mentioned by the OP is about an
order of magnitude too small to be anything worthwhile, and anything
worthwhile will be too expensive for most homeowners. That's why LEDs
have not entered the home yet for general lighting. They are either
too inefficient or too expensive. Most of the multi-LED MR16/GU10
format ones are about the same efficiency as a filament lamp (way
worse than a fluorescent). Given they can't be more than 3W because
that will cook the LEDs, you'll get no more than 3W equivalent of
light from them, although it will all be concentrated in an intense
6" circle on the floor underneath, if that happens to be useful to you.
You'll also find many of them dim and die within a few thousand hours,
and the expected life quoted on the product was completely wrong.

Philips have come out with a range of 2W (IIRC) retrofit LED candle
lamps. I think they're around £20 in the shops, and at 50 lumens,
equivalent to about a 10W mains filament lamp, and life same as a
top spec CFL (although a CFL would be twice the light output).
That's about as good as you can get in an LED product which is
anywhere near consumer pricing levels at the moment.

--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]

Graham. ) wibbled on Monday 24 January 2011 19:58:


"Richard Russell" wrote in message
newsp.vptrl4vgn5ksl5@richard...
On Mon, 24 Jan 2011 18:04:20 -0000, Tim Streater
wrote:

When you press the switch, the light comes on.

Some CFLs reach full brightness nearly instantly (we've got one in our
downstairs loo and you don't really notice any delay).

Richard.
http://www.rtrussell.co.uk/

I've got some cheap candle CFLs in the hall and I swear when you switch
them on, the room actually goes darker!


"Satan's Lamps"

--
Tim Watts

On Jan 24, 6:23 pm, Tim Streater wrote:

As a matter of interest, do you remember which brand they are, and what
type (pencil or squiggley)?

I'm pretty sure it's a helix, and it might be this: Pro-Lite Plus
SCR-11W. I've just checked one from my spares box and it lights quickly.

Richard.
http://www.rtrussell.co.uk/

On Mon, 24 Jan 2011 22:26:01 -0000, "Richard Russell"
wrote:

On Jan 24, 6:23 pm, Tim Streater wrote:

As a matter of interest, do you remember which brand they are, and what
type (pencil or squiggley)?

I'm pretty sure it's a helix, and it might be this: Pro-Lite Plus
SCR-11W. I've just checked one from my spares box and it lights quickly.

Where do you get them from. I've done a quick search and can't find
any UK retailers selling these bulbs with BC fittings.
--
(\__/) M.
(='.'=) Due to the amount of spam posted via googlegroups and
(")_(") their inaction to the problem. I am blocking some articles
posted from there. If you wish your postings to be seen by
everyone you will need use a different method of posting.

On Mon, 24 Jan 2011 17:58:06 -0000, "Richard Russell"
wrote:

On Mon, 24 Jan 2011 17:08:51 -0000, john eastwood
wrote:

you have given no information about the £100 one...for a house light
bulb ??

This Osram 12W LED (claimed 60W equivalent) is over £50 including VAT:

http://www.thelightbulb.co.uk/produc...osram-parathom

It claims 25000 hours life (not 2500). What's the advantage of LED over
CFL (given that the efficiencies and lifetimes are similar) that might
persuade somebody to pay that much?

I've got some 4-5W LED lights that seem almost as bright as the
original halogen lights. They're much better than CFLs and, if they
last as long as they claim, will be cheaper overall. The are about
£15 ea. IIRC.
--
(\__/) M.
(='.'=) Due to the amount of spam posted via googlegroups and
(")_(") their inaction to the problem. I am blocking some articles
posted from there. If you wish your postings to be seen by
everyone you will need use a different method of posting.

On 24/01/2011 18:04, Tim Streater wrote:
In article op.vptqu4wtn5ksl5@richard,
"Richard Russell" wrote:

On Mon, 24 Jan 2011 17:08:51 -0000, john eastwood
wrote:

you have given no information about the �100 one...for a house light
bulb ??

This Osram 12W LED (claimed 60W equivalent) is over �50 including VAT:

http://www.thelightbulb.co.uk/produc...12watt-gls-es-

e27-screw-cap-cool-white-osram-parathom

It claims 25000 hours life (not 2500). What's the advantage of LED
over CFL (given that the efficiencies and lifetimes are similar) that
might persuade somebody to pay that much?

When you press the switch, the light comes on.


I only know of one modern CFL (not one make - one lamp) that does not
light immediately - it is one a friend got sent free by her gas company.
It used to take about 15 seconds to give any light, although has got a
lot quicker with use.

I have bought a variety of types and makes, including Tesco 10p lamps.
They all light immediately, although not at full brightness, which can
take a few tens of seconds.

Colin Bignell

On Tue, 25 Jan 2011 09:23:02 +0000, Tim Streater
wrote:

In article ,
Mark wrote:

On Mon, 24 Jan 2011 22:26:01 -0000, "Richard Russell"
wrote:

On Jan 24, 6:23 pm, Tim Streater wrote:

As a matter of interest, do you remember which brand they are, and what
type (pencil or squiggley)?

I'm pretty sure it's a helix, and it might be this: Pro-Lite Plus
SCR-11W. I've just checked one from my spares box and it lights quickly.

Where do you get them from. I've done a quick search and can't find
any UK retailers selling these bulbs with BC fittings.

http://www.lake-renewable-energy.com...=1295947348052

looks like one place.

Not cheap but if they're good they may be worth it. Do they actually
last as long as claimed and do they not "dim" quickly over time?
--
(\__/) M.
(='.'=) Due to the amount of spam posted via googlegroups and
(")_(") their inaction to the problem. I am blocking some articles
posted from there. If you wish your postings to be seen by
everyone you will need use a different method of posting.

On Tue, 25 Jan 2011 10:08:43 -0000, john eastwood wrote:

Anyone any experience of these....advantages and disadvantages?

yes sorry it was 25,000 hours not 2,500 and they are from Lidl. see:

http://www.lidl.co.uk/cps/rde/xchg/l...ndex_17284.htm

Ah, I bought one a few months back when they were mentioned in here
previously. It works. All the LEDs still work, though it doesn't get
much use, less than an hour/day.

Colour temp is slightly cold compared to tungsten but not that
horrible "icy blue" of some LEDs. Output I'd say is comparable with a
40W tungsten R60 reflector. Spread isn't bad, maybe 2' across at 3'
to 4' and is even. The drop off from the the evenly illumated patch
is much more rapid than that from a tungsten bulb.

--
Cheers
Dave.

On 25 Jan,
"john eastwood" wrote:

Just seen for sale light bulbs for the house, each one consisting of 15 of
those LEDs. They are going for about £6 each and are rated at 2500 hours
lifespan.

Anyone any experience of these....advantages and disadvantages?


yes sorry it was 25,000 hours not 2,500 and they are from Lidl. see:

http://www.lidl.co.uk/cps/rde/xchg/l...ndex_17284.htm

Got two of those recently. One is excellent(Larger screw type), the other one
(MES)gives spots of light of one colour and the rest slightly different.
Makes paper appear to be stained. One I got from HK gives excellent light,
a pity about the RF interference it generates, I can't use it for that
reason, but will try a capacitor across it when tuits occurr.

--
B Thumbs
Change lycos to yahoo to reply

On Jan 24, 11:17 pm, "john eastwood"
wrote:
Just seen for sale light bulbs for the house, each one consisting of 15 of
those LEDs. They are going for about 6 each and are rated at 2500 hours
lifespan.

Anyone any experience of these....advantages and disadvantages?

I've had something similar in my fake gaslamp outside for several
years. They are rated at 12 volts DC and I ran them off a car battery.
But I had a charger on the battery so the voltage was a bit high and
some of the LEDs got a bit dim after a few weeks. I've put a
resistance in series to bring the voltage down.
At only 3 watts there is not a great deal of light.

On 24/01/2011 22:51, Tim Streater wrote:
In article op.vpt29nc0n5ksl5@richard,
"Richard Russell" wrote:

On Jan 24, 6:23 pm, Tim Streater wrote:

As a matter of interest, do you remember which brand they are, and what
type (pencil or squiggley)?

I'm pretty sure it's a helix, and it might be this: Pro-Lite Plus
SCR-11W. I've just checked one from my spares box and it lights quickly.

Thanks - I'll check them out.

Philips also do a line that claims to light very fast. I saw them at
Saino's last week, so they cannot be that hard to check out. Saino's
prices on lamps are not great, by the way.

HTH,
Kostas

--
Emails to this address are dropped.