Cree Q5 slight discolor

Hi, I need your help guys. I have a cygolite dualcross bike light that i upgraded the bulbs to Cree Q5's. I've been using it for almost 8 months on twice a week of night riding. Sometimes once a month only. My concern right now is that i noticed that one bulb has a light yellowish color when beamed on the wall you can notice it, unlike the other bulb it's still pure white like the day i installed it.

What seems to be the problem w/ the bulb? Or is it the driver of the lights? I didn't touch anything its just that i noticed it last night when i beamed the light on the wall. Please help me with this problem on my Q5's.


Thank you

Were they definately the same when you installed them? Potentially you have two different LED tints. Another option is that the yellow one is starting to degrade, either natually or due to heat. This is more likely if youre driving them at high currents or with poor heatsinkig