Replacing light bulbs with LEDs - LED lightbulb information

JimmyMac

Thanks, not needing anything that dims and only 4 bulbs to replace

SteveAWOL

I posted this over in Decent gu10 led? | Page 5 | AVForums back in November but still might be of interest to you...

rousetafarian

Which type did you go for in the end?

JimmyMac

The ones Steve mentioned in his post above, they were the same ones I had in previously but I couldn't find them for the life of me, meant I only needed to buy a couple

http://www.amazon.co.uk/gp/product/B007DIJDVE?tag=av0c-21


Still need to work out something for under the counter lighting now though

Branko011

Hi, has anyone ever used LED GX53?
I installed 20 of them in the wall fittings, and after 2 weeks, 10 of them stopped working! I opened the fitting and noticed that the bulbs were very hot. And LEDs don't create a lot of heat!?!?
Anyone can explain?
Thanks

Slalom

Hi i don't know about the particular set up you have.

But LED torches and Bike lamps have big heat syncs for the electronics. Now if the back of an LED has no/poor ventilation the circuitry may toast itself.

I use CFL GX53 under my kitchen cupboards with no issues, I have fillings the bulb sits on making a neat cylinder. I do not have the kettle or coffee maker under a cupboard by the way.

It won't be a problem with a bit of air space, can you upload a photo of the fitting?

MartinPickering

You are mistaken. LEDs are a lot less than 100% efficient in converting electricity to light so obviously heat is generated as well. The more powerful LED lamps have heat sinks, which must be in free air to allow effective ventilation. If you have enclosed them, then you've only yourself to blame for your ignorance. Do more research.

LEDs can be run in a more efficient way by using pulse modulation.

Branko011

It's true, the fitting is enclosed, but it is supplied with GX53! For the past 2 years we had CFL, but within one year, all of them stopped. So I decided to replace them with LED, and they are stopping even before! What is the use of the fitting where the bulb has to be change so frequently!
I'll try to  take the photo and upload it.

MartinPickering

GX53 is a 4 to 7 Watt LED. Even assuming 4 Watt with 75% efficiency, that's 1 Watt of heat being dissipated from a tiny area. The LED chip will be HOT. (See how long you can hold an ordinary old-fashioned 1 Watt torch bulb in your fingers.)

The rated life is 15,000 hours. Sounds good? Well, that's just 1.71 years under typical conditions. Place it in a warm room without ventilation and the lifetime is reduced. Buy a cheap equivalent off, say, eBay and you'll probably be lucky to get 1 year.

Norrie45

I bought two Philips MR16 10w leds to replace 50w bulbs in my kitchen.  They worked fine, so I bought 10 more.  They do not work in any of the sockets, but the original two work in several sockets.  The 12 bulbs are all the same specification.  These bulbs are supposed to work with all transformers.  Help please.