Glowing T Key (Changes with Temperature)

I just recently noticed my T key is a lot brighter than every other one and that the u, i, and o keys have little to no backlighting. I kinda figured it was something I never noticed till now, however I just realized something that maybe that wasn't the case. I tried to take it with a picture, I turned off the flash but the camera doesn't seem to be able to pick up the difference.

I start up a game, I have a temperature monitor on. Once the CPU reaches around 80 degrees the keys appear uniform. Stop the game and when the CPU reaches 75 the T starts to get brighter and by 65 its at maximum brightness. It's kinda hard to tell but it seems like the T key actually darkens when it gets to 80, not the other keys matching the brightness. What is probably more likely is that they meet halfway.

I don't plan on returning the laptop because of this problem since I don't mind having the keyboard fully off, however if the problem doesn't go away, I will definitely bring it up should something else happen.

I was wondering your thoughts on the issue? I'm guessing its not a self repairable issue.

Btw: it is several levels higher than the other keys at each setting. The first few levels make it look like only the T key is on.
I'm
Also I noticed that it is viewable on a larger screen, heres a picture of what I'm talking about.

 

As soon as I posted it and saw the result, I went through several edits to fix it