I am having trouble with hot spots When using a hot light indoors. I seem to only have problems when shooting nudes. My hot light is 500 wt And I am using a Diffusing umbrella. With this set up and the light about 4ft away from the subject I'm generaly using F/4 at about 1/30th sec. Everything else Seems to be about where I want it tone wise. Any help that can be offered whould be much appriciated. One thought I had were to turn the light away from the subject and reflect it back in. I have a very limited amout of space So the light can't be moved away more than about 2 more feet. Please help!