lights on keyboard broken

I have read a few of the problems on here about the lights being broken.. but nothing gave me any help with my problem. I have had my mbp for about 2 years and the lights on the keyboard have always worked no problem. but i think they might be dimming or something.. I have the brightness set to full and the centre of the keyboard is lit up the same as it always was but the sides of the keyboard are invisible in the dark . its like the light deos not stretch the full length of the keypad.

are there bulbs in the laptop or something that maybe need changing?
i dotn want to take the keyboard apart myself if there is nothing that can be done abotu it.
thanks for any help

If you have applecare, I'd suggest you go to an apple retailer store and have them look at them or even call Apple Tech. for advice and see what they have to say.