One could always consider paper lanterns w/ 5oow globes. I have lit many a white cyc and green screen in this manner. We clamp balls from their cable to the grid in 4 to six foot grids pattern. Once you build the porcelain base and cable, they are easy to use and easy to store. Remember to use a small piece of 216 to plug the opening in the bottom of the china ball. Granted they cannot be too high so the method works well with lower ceilings (12 to 20'). Then come in with your big source from frontal, with a slight more edge than the top light. As to the space lights, as Mr Mullen pointed out , the diffusion is important, yet once again there may be a pattern due to proximity. I have found that cutting a dot of about eight plus inches in diameter ( from duvateen or blackwrap ) and laying it center on the diffusion will even the amount of light that meets the base.
