I really like this lighting pass pomp! I love how bright it is. Its almost like mirrors edge without being it which is awesome! I say keep it bright and go with your current style as its doing really well! Love the soft look of the walls and the hard realistic reflections on the center pipes, truly eye grabbing!
edit: Maybe instead of adding blue to walls or something using textures, try adding blue with a very diffuse light that would make the environment look colder, I think it would be a nice touch if you could make it seem somewhat cold as if these were holding co2 or something :}!
[Blocked Image: http://img858.imageshack.us/img858/4796/pomp.th.jpg]