Can LEDs change tint?

chicken dave · Oct 10, 2010

I have had a Zebralight SC50w for a couple months. When I first got it, the tint seemed very yellow - I considered returning it. Using it this morning, it occurred to me that it doesn't seem yellow any more. It's a creamy white that I find very pleasant. So, is it possible that the tint has shifted, or is it my perception that has changed?

hcb · Oct 10, 2010

I am by no means an expert, but I would not be surprised if the plastics used in the collimator could change color (or rather, become colored) when they age. This should of course not happen under normal operating conditions.

Or, you have just gotten used to the tint of the light

PerttiK · Oct 10, 2010

I once thought neutrals looked too yellow, but after using couple of neutrals outdoors without any other light sources, they now look very pleasing.
Indoors for short bursts they appear quite yellow.

monkeyboy · Oct 10, 2010

I have a petzl myo xp with SSC P4 that started out with a severe yellow/green tint but over a couple of years turned regular cool white. it seems as though the colour of the die itself has changed and not the dome. weird

Th232 · Oct 10, 2010

hcb said:
Or, you have just gotten used to the tint of the light

This is a definite possibility. When I'm using my Quark a lot on moon mode, it's most definitely greenish, but after a while it looks pure white to me. Then I switch to another light for a while, back to the Quark, and it's greenish once more.

Nasty · Oct 10, 2010

Yes they can change.

Even diamonds can...they irradiate them to force the shift.

jellydonut · Oct 10, 2010

Too much heat or voltage can make it change tint, I am guessing by ruining or altering the phosphor somehow. I don't know if it's normal that it changes under normal running conditions.

I used 3 CR123s on a unit that could only take 2 for just a couple of seconds, and now it's got a border of 'pimp purple' in the spill.

I'm just glad it still works at all.

Can LEDs change tint?

chicken dave

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hcb

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PerttiK

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monkeyboy

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Th232

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Nasty

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