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DimPrawn
19th November 2009, 15:38
http://news.bbc.co.uk/1/hi/uk/8367933.stm

Energy-efficient light bulbs lose on average 22% of their brightness over their lifetime, a study has found.

In some cases they emit just 60% as much light as traditional models which are being phased out of shops, it says.

The study in Engineering and Technology magazine concluded that consumers were being misled by the bulbs' packaging.

Of the 18 energy-saving bulbs tested over 10,000 hours by the Institution of Engineering and Technology, three stopped altogether.

Critics, however, claim they can trigger migraines, make skin conditions worse and lead to other health problems.


But most friggin annoying of all is the fact the ones I seem to have ended up with take 10 minutes to reach full brightness. Until then they just slightly glow orange.

:tantrum:

Clippy
19th November 2009, 16:18
http://news.bbc.co.uk/1/hi/uk/8367933.stm

Energy-efficient light bulbs lose on average 22% of their brightness over their lifetime, a study has found.

In some cases they emit just 60% as much light as traditional models which are being phased out of shops, it says.

The study in Engineering and Technology magazine concluded that consumers were being misled by the bulbs' packaging.

Of the 18 energy-saving bulbs tested over 10,000 hours by the Institution of Engineering and Technology, three stopped altogether.

Critics, however, claim they can trigger migraines, make skin conditions worse and lead to other health problems.


But most friggin annoying of all is the fact the ones I seem to have ended up with take 10 minutes to reach full brightness. Until then they just slightly glow orange.

:tantrum:

That's because you've bought a box of candles.

HTH.

RichardCranium
19th November 2009, 16:20
Thank feck for that.

I have been banging on about how we've been conned by these things for yonks.

They're crap, crap, crappity crap.

Moose423956
19th November 2009, 16:22
They don't work very well with those touch sensitive lamps, where you touch it once and it comes on low, then touch it again and it gets a bit brighter, then touch it once more and it comes on full brightness. With the low energy bulbs the lamp just stays the same brightness no matter how many times you touch it.

Board Game Geek
19th November 2009, 17:08
Thank flip for that.

I have been banging on about how we've been conned by these things for yonks.

They're crap, crap, crappity crap.

I think they are brilliant, because the environmentalists told me so, and their research is always right, and they wouldn't lie to us.

Okay, perhaps we will need more and more of these lights, due to their reduced lifespan, but all the extra manufacturing, additional transportation and trips to the supermarket is still ok, since we are buying "green".

Trips that consume energy solely for the purpose of obtaining green energy and products don't count.

Eg, taking the old CRT telly to the dump in the Hummer is bad.

Taking the Hummer to the dump to drop off a plastic bottle in the recycling bottle bank is good.

OwlHoot
19th November 2009, 17:18
and don't forget the team of spacesuited cleaners you have to call in to clean up the powdered mercury if you break one.

Roll on decent LED "fir cone" bulbs.

MPwannadecentincome
20th November 2009, 00:26
I thought when I saw the title "Dim" that you were going to insult yourself :wink


http://news.bbc.co.uk/1/hi/uk/8367933.stm

But most friggin annoying of all is the fact the ones I seem to have ended up with take 10 minutes to reach full brightness. Until then they just slightly glow orange.

:tantrum:

Try the Philips Turbo model its almost instant brightness, also see this (http://www.eurogamer.net/forum_thread_posts.php?thread_id=145041)

Board Game Geek
20th November 2009, 01:21
I thought when I saw the title "Dim" that you were going to insult yourself :wink



Try the Philips Turbo model its almost instant brightness, also see this (http://www.eurogamer.net/forum_thread_posts.php?thread_id=145041)

Why are the wattages so low ?

I'm was used to 100w bulbs in my teens, and even then that was too dark sometimes. 30w ? pah !

original PM
20th November 2009, 09:15
yeah but they are really cheap - maybe as cheap as other light bulbs

having said that I have not bought any bulbs for a while so they may always have been cheap.

more to the point I am really adding anything to this thread?

MPwannadecentincome
20th November 2009, 11:23
yeah but they are really cheap - maybe as cheap as other light bulbs

having said that I have not bought any bulbs for a while so they may always have been cheap.

more to the point I am really adding anything to this thread?

Nope! :laugh

which is a bit unusual for you actually

original PM
20th November 2009, 11:36
aw shucks thanks!

:emb

Tarquin Farquhar
20th November 2009, 11:39
They don't work very well with those touch sensitive lamps, where you touch it once and it comes on low, then touch it again and it gets a bit brighter, then touch it once more and it comes on full brightness. With the low energy bulbs the lamp just stays the same brightness no matter how many times you touch it.you are supposed to throw out all your old light fittings that don't work with the new bulbs, and buy new light fittings to go with the new CFL bulbs that you have bought, if necessary also changing your lifestyle to suit the new bulbs and fittings.



Try the Philips Turbo model its almost instant brightnessi.e. also throw out (carefully!) the CFL bulbs that you have already bought at substantial expense, and buy new ones? Pending the requirement to dispose of them too (carefully of course!) and buy LED bulbs at even greater expense, when they get round to making and selling them.

DimPrawn
20th November 2009, 12:28
Just poke your own eyes out with a hot poker and stop worrying about it.

MPwannadecentincome
20th November 2009, 12:31
You can still get rough service 100W bulbs.

Proper ones.

But they're not as bright as General Service 100W bulbs.

excuse me, rough service and general service???????


aw shucks thanks!

:emb yr welcome!


...and buy LED bulbs at even greater expense, when they get round to making and selling them.

you can buy them now, not in the shops though - they are about £40 plus.

TimberWolf
20th November 2009, 12:43
Haitz's Law (http://en.wikipedia.org/wiki/Haitz%27s_Law)


...the cost per lumen (unit of useful light emitted) falls by a factor of 10, the amount of light generated per LED package increases by a factor of 20, for a given wavelength (color) of light. It is considered the LED counterpart to Moore's Law, which states that the number of transistors in a given integrated circuit doubles every 18 to 24 months.[1] Both laws rely on the process optimization of the production of semiconductor devices


The development of LED technology has caused their efficiency and light output to increase exponentially, with a doubling occurring about every 36 months since the 1960s

:smokin

There is a theoretical upper limit of course, and that works out to be around 2 hours at 100 watt bulb brightness equivalent (~1000 lumens) from a single AA battery. Currently it's something like 30 minutes, 25% of maximum possible.

MPwannadecentincome
20th November 2009, 13:11
Just poke your own eyes out with a hot poker and stop worrying about it.

so did you do it yet?

DimPrawn
20th November 2009, 14:04
so did you do it yet?

Oh the pain....

:frown

vetran
20th November 2009, 23:23
got a 3w Led for the shower its about 20w, nice light compared to the original50w slightly dimmer but consistent light.

Waiting for decent led lights.