Here's a green screen,Put me somewhere.
Green screens are often brightly lit for a reason; it fucks up the use of the green screen if its darkened and it doesnt contrast enough from the subject.
I'll try and send a brighten pic tomorrow.
More important than brightening it up in general: Green screens are supposed to have a uniform green shade which to my knowledge is why they're so well lit in the first place. Yours has an obvious shade between floor and wall.