Here is my recommendation, ditch the mesh emission for the lights, it's a waste of render time.  Instead, create 1 area light and X-, Y- scale it to the approximate dimension of one overhead light.  Position it as close as possible beneath one of the ceiling lights.  Duplicate the area light and X-translated it to the other light.  Give the ceiling lamps a very low ambient just for a glowing effect.  Set up the area lights to 85% intensity, lower if you like, and add a blackbody node for realistic illumination.  Your scene should look like this:

I did change some materials to Cycles and added a different flooring (I know, tiles too big).  All other lights in the scene turned off, just the 2 area lights illuminating the room.  Rendered on default settings, CPU; it took a couple minutes to render completely.