Hey Jon.. thanks alot for the reply =), i tried what you suggested but it didn’t work, the whole footage (greenscreen, and actor) became brighter, and the brightness value was stuck on 100 through out the footage. the light that was causing the problem was on the actor only, but the green screen lighting was nice and consistent.. it was about 112, so i guess it was very close to what u suggested. i would be happy if you have more suggestions, i was compromising by making the background flicker like the actor just for the sake of the composition, but i would rather cancel both of the flickering.
Thanks alot in advance =)