The lights are definitely brighter in the After picture. But beyond that, is the issue really the lights or is it the shaders for the wall on the right? In the Before picture, the whole wall on that side seems to have the same material properties. In the After picture, it looks like part of that wall either is now matte black and not showing any illumination, or it's been pushed back out of view. You can no longer see the part that the metal thingy is mounted on, where you could in the Before picture.