LED Downlights Dying

vacheron

The reason the white LED's will glow is that the use a phosphorescent coating to emit the natural looking yellow(ish) light. When this has been energised with photonic energy from the LED die when the light is lit, it will glow. It will however also glow dimly for a while after they have been switched off in the same manner that a phosphorescent (fluorescent) tube will do.

Also, if the bulb has failed dim it could be drawing a reduced current which would cause the capacitance of the drive and smoothing circuitry inside the bulb to discharge more slowly, giving a more noticeable "fading" appearance to the dimmer bulbs.

Is is simply possible that the LED lights in your kitchen are used a lot more than the ones elsewhere around the house? Also, if your kitchen has good insulation in the roof they may be running a little warmer than the others?

Rusty_Shackleton

vacheron wrote: »

Is is simply possible that the LED lights in your kitchen are used a lot more than the ones elsewhere around the house? Also, if your kitchen has good insulation in the roof they may be running a little warmer than the others?

They're not used a whole lot in terms of hours on, but they are switched on and off a lot compared to say, the lounge or dining room lights.There's no insulation above the suspended ceiling (I can see the artex on the original ceiling above it!), although LEDs don't produce much heat at all anyway.

I'll pop back and let you all know what an electrician says