Don't use colored flash units!

I have a pair of yellow Alien Bees B800 flash units. When I bought them, years ago (one for home, one for work), I bought the versions with bright yellow bodies for no real reason. Well, I've been experimenting with a studio setup with these, using umbrellas in reflecting mode and wondering why there was a brown/yellow reflection in my glasses. It appears that the flashreflected over the yellow body lights up the body and the yellow glow is picked up in my glasses. I've established this by switching to a single unit and turning off all other light sources in the room, and the glow is only in the lens on the same side as the flash unit.

So, now I need to work out how to prevent the flash unit from glowing yellow without blocking any of the ventilation!
--
Jeff Peterman

Any insults, implied anger, bad grammar and bad spelling, are entirely unintentionalal. Sorry.
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