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Terry Casey

In article ,
says...

Checking things here on my own PS, it's the LEDs
themselves which have all gone low output...

...And rather bluer than the spares.

I've had the odd LED fail - but never anything like
this. Any explanation?

My understanding is that White LEDs are actually blue LEDs
which also produce UV which causes a yellow phosphor to
fluoresce. The 'white' light is a combination of the two.

So, perhaps in your case it is the phosphor which is under
performing, thus the blue shift.

--

Terry