Thanks! :-)

  Lights, lights.... they are all there. The light sources are those coming from the ceiling lights, and from the angled wall lights (a bit above those yellow foam pads.) There's a light coming up from the floor where that tech is working (he needs to see what he's doing.) There is more corridor beyond the camera. No sunlight is coming in, all openings are sealed off.

  I did want to make this more dark.

  The scene came about from those old style lights on the ceiling. Years ago when I was studying at LSU, I used to walk through the campus to my apartment at night, and would pass near an old building--the oldest on campus. There were some small windows along the side, near the ground as the building had a type of basement. What I saw was a small, narrow corridor lined with pipes and illuminated by these types of lights. Ever since then I wanted to make lights like those and use them. This scene came from that.

  The idea of the yellow walls.. they were/are supposed to be foam. The idea being if people were bounced around, with all that metal, someone could get seriously hurt.

Thanks for the feedback. I'll probably redo the whole scene, but i'll keep the ceiling. I'll look into upgrading the lights.