Roof & Lighting fixtures done - "attempts" at ligthing started

So below is the almost complete environment for the initial scene. Its starting to come together quite nicely, just a few things need tweaking. The main things that need to be finalised are lighting and textures, but the idea of doing everything early is so I have plenty of time to make any alterations later.

Trying to portray the contrasting light is proving quite difficult. I like the first shot, as it shows the shadows and indicates that Batman would be well cloaked in the animation, however when the lights then come on and the room is illuminated, its not that much brighter. I've been playing with the lighting for about an hour and still haven't got it perfect.

I've also been reading a lot of online-based tutorials so hopefully this will all sort of click at some point.