GU10's Blowing....

..whereas my LV stuff blows a couple a year max, and thats on about 16 bulbs or more..make that 20. Forgot the other bathrooms..

Reply to
The Natural Philosopher
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That's still a 10% failure rate though, which seems pretty poor.

Reply to
Jules

well that equates to around ten years life per bulb, doesn't it?

The ones that are on most, are, after 7 years, on their third bulb. Kitchens and corridoors with no natural light..

Some that dont get used much - toilets and bathrooms, have not failed at all

Reply to
The Natural Philosopher

The logic makes sense - but not enough to tempt me away from LV spots for the shear lack of hassle between now and a suitable replacement being viable. (if you use one xfrmer per lamp, then its easy to rever to mains later)

Between this house and the last, I had/have about 12 GZ10s (i.e. 12V). Had 1 bulb failure in about 2 years. The light quality is much better as well.

Reply to
John Rumm

Go LED.

Lamps like this are a straight replacement:

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available in warm white.

They "just work" and if they are used 24/7 will pay for themselves in 6 months (on the basis that 1W 24/7 = £1 per year)

Buy a couple and try them. You will be surprised.

Reply to
Vortex4

Do they really compare favourably to a 50W mains GU10? I'd love to migrate to LEDs but everything I've read says that the light output claims are way off the mark.

Reply to
pcb1962

In article , aswell13 writes

So they're pointing upwards? No wonder they are failing.

Reply to
Mike Tomlinson

In article , Vortex4 writes

I did. I was. Lousy light quality.

Reply to
Mike Tomlinson

No, LEDs still suck for price, brightness, colour and price. They're getting there, but still not yet.

I'd use the reels of tape for undercupboard kitchen lights, but not use them for primary lighting yet (colour) and the plug-in replacements for LV or mains halogens are still too dim for the price to make a complete refit affordable.

Reply to
Andy Dingley

replacement:

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>>> Also available in warm white.

That's right. There are no specs quoted, not to mention you probably won't like the cool white (probably pale blue).

Reply to
Andrew Gabriel

Whenever I've seen them, the excessive heat they produce always seems to have put burn-marks in the surrounding ceiling. This leads me to think they are somewhat of a fire risk.

Neil

Reply to
Neil Williams

replacement:

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> Also available in warm white.

Do they really compare favourably to a 50W mains GU10? I'd love to migrate to LEDs but everything I've read says that the light output claims are way off the mark.

Reply to
Vortex4

Exactly what lights are you comparing?

I don't thaink you would say that if you has tried a 48SMD LED GU10 like I pointed out.

Reply to
Vortex4

Yes they are...does that make a difference? Stupid question as you are saying it does!

Problem is if they are pointed down they wont light up the display :-)

Answer is to buy cheap ones (50p) off ebay and keep changing them or go LV (or is the problem the same?) I have a feeling LED's won't be bright enough.

Mike Toml> In article , aswell13

Reply to
aswell13

It's impossible.

Let's assume a GU10 50W halogen is 10lm/W (it's probably not really that bad, but we'll assume it is for the moment).

That means we'll get ~500lm from the mains halogen.

The LED is 3W (which is about the only bit of the spec they give). If it was to generate 500lm, it would need to be 500/3 = 167lm/W. Sorry, not a hope in hell in something that size, without active cooling, and without a price tag vastly higher.

Reply to
Andrew Gabriel

If you have GZ10 you have GU10s rarer variant. think you mean GZ5.3

GU10 has an aluminised reflector, all heat goes with the beam, and fades perishables faster.

GZ10 loks like GU10 twist and lock base , but has chamfered corners, supposed to stop mis lamping, bit of gorillaing and it dosen`t...

GZ10 like most LV MR16 has a dichroic reflector, cold mirror, large amount of heat goes back through fitting, hence risk of mis lamping. Cold beam is kinder on perishables.

Cheers

Adam

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Reply to
Adam Aglionby

I never said that the LED lamps compared 50 Watts did I?

OP was talking about 35W lamps. I merely suggested he looked at LED alternates.....which when used in a 24/7 retail context would undoubtedly save money....specially given the GU10/halogen reliability grief...and I argue give a comparable amount of light.

Empirically, all I can say these LED lamps certainly compare (or even exceed

20W halogen alternates) in intensity. The SMD LED lamps that are becoming obtainable today today are streets ahead of anything available in the sheds (IMHO complete s**te) and are worth a look.

I merely suggested OP would be surprised. Why is that impossible?

Reply to
Vortex5

Vortex4 wibbled on Thursday 03 December 2009 10:51

I think if I were trying them, I might go for:

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LED is at least branded CREE which is one of the top manufactures.

After my previous experiences with LED lamps, I'm not buying anything unless it contains Cree or Luxeon LEDs...

Reply to
Tim W

Problem being that Luxeon have been victim of conterfieting in past , used to call them Ruxeons

Nichia, Japan, make the nicest white LEDs available , priced accordingly, Taiwanese companies like Formosa Epitaxy are comiing up fast.

Its still a lot of a minefield and price is definately no guarantee to quality.

Cheers Adam

Reply to
Adam Aglionby

Adam Aglionby wibbled on Thursday 03 December 2009 21:19

That's useful to be aware of...

Of course, and Nichia.

It was bad enough with cheap tungsten vs decent, but there are only so many ways a crap factory can bugger up a filament lamp...

Reply to
Tim W

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