I would use a night HDRI for the environment and GI. The rect lights in your building may need to be turned up in order to get the glow you want. My suggestion is to play with a test model using just a box with a 'window' cut out and try the methods described above to see what gets the effect you are looking for.

Nice FREE HDRIshttp://www.hdrlabs.com/sibl/archive.html

jenujacob

I guess printing the manual will make it easier to use and indeed the forum looks interesting. Good starting points. Thnx

(Afterburn)

if the vray physical camera is on and less value for your rectangular light. you wont really see them. physical camera works together hand in hand with the the vray sun. if you are using night scene better to turn off the physical camera. all lights (omni or point lights, emmisive and rectangular lights will appear)

if you insist in using the camera try lowering your fstop value, decresing the shuterss speed or even makign your ISO higher, but lo be careful because if your using ISO more than 800, the image will become noisier.