I have a question what is used or can be used for diffusion of their lights. I am shooting using reflector lamps with practical light bulbs and halogen work lights. However, the light is to harsh and I want to soften it up a little. What works best and will not start a fire? Also I guess this question could also be asked about gels. Any suggestions at all would be greatly appreciated.

wax paper works well. Try reflecting the light also with foam board.

there may be somthing special about me... but i have managed to start a fire with a simple gel on a cable-tv studio lamp. they were both meant to work together and three minutes after I set them up we were stomping out the carpet

so be careful...lol