Light Effects in post production

Hi community!

I have a question: I made a video of a tech product, basically made of two screens and a white plastic support. To avoid reflections, I darkened the room. Now, the background in the video is too dark, and I need to recalibrate the lighting to make it look artificial. I tried using masks. They seem to work, but it’s a long process since the lighting conditions changed during my shooting. (Did not quite had time to set the whole room!) Does anyone have a better solution to suggest? Thanks a lot to anyone who replies!