I am building a workspace that will be large enough to allow me to shoot still lifes in part of the space. Unfortunately, window light - my usual favorite - is pretty limited so I will need artifical light. I mostly shoot black and white, so color balance is not so critical, but I would like to keep exposures in the 1 second or shorter range. (Recognizing that this will not be possible if I get into significant bellows factors.) Cheap would be nice.