Dusk to Dawn LED lighting outside

[pvr]

I know there are some light experts on here, so wanted to some help with quality LED lightings for outdoor. When I read up on the outdoor units, they never seem to last long which is exactly what I want to avoid.

Currently, in the eves of each corner of the house I have SOX lights which are expensive to run as they fail every two years and they cost about £20 a bulb. Also they are high up and I don't like the balancing act on top of a ladder to change them …

So … what is available that is not necessary cheap but that is good quality (all needs to be wall fixed and looking down).

 

[cj10jeeper]

PVR - for different reasons I was researching some LED lights for use indoors. Seems a major issue is that if they get hot they reduce in output (or fade). Dropping to 50% in a couple of years is not uncommon.

In my own words 'The primary cause of this loss of output is a reduction in quantum efficiency as dislocations in the chip’s crystal structure increase adding to the number of sites where non-radiative recombination can occur'.

Seems the more power they are generating the more the problem is increasing. Might be similar to the reason for failures on outside lights.

 

[pvr]

CJ, impressive knowledge and terminology for an average friday evening

I have a fair amount of units upstairs in the bedrooms and bathrooms so that I could put the fire caps in the loft on top of them and put insulation on that of that again rather than the gaping holes in the insulation I had before due to halogen lights.

In the 3 years of using them, I had to replace 2 of them under warranty (expensive at £19 a shot).

Just not sure what to do outside as I like the light of the SOX lights, but not the replacement hassle / costs.

 

[cj10jeeper]

CJ, impressive knowledge and terminology for an average friday evening

I have a fair amount of units upstairs in the bedrooms and bathrooms so that I could put the fire caps in the loft on top of them and put insulation on that of that again rather than the gaping holes in the insulation I had before due to halogen lights.

In the 3 years of using them, I had to replace 2 of them under warranty (expensive at £19 a shot).

Just not sure what to do outside as I like the light of the SOX lights, but not the replacement hassle / costs.

I agree - the bulb had moved to becoming the most expensive part of a light installation whereas it used to be a few pence.

Be interested what final answer you come out with.

As you like my technical language on the subject try this:

Modern white LEDs are based on indium gallium nitride (InGaN), deposited on a transparent substrate such as sapphire or silicon carbide (SiC). The band gap of InGaN can be manipulated by altering the ratio of GaN to InN such that emitted photons are in the 390 to 440 nm part of the spectrum (ultraviolet, violet-blue, and blue). “White” light is emitted because some of the blue photons are absorbed by the LED’s phosphor coating and are re-emitted as yellow. The combination of blue and broadband yellow produces white light