From what I've read about linear workflow, it might be causing this problem. If so, how can I manually control linear workflow in blender? Here's what's happening:
I am trying to make a shiny surface with lights in it for a game. This is a render when the lights are inactive:
But when I change them to an emission shader, the image as a whole dims.
This is a problem because in my game, I want to be able to overlay the lights as active or inactive, but since the images are different brightnesses, it's very obvious that it was cut and pasted on.