Quote Originally Posted by Trond View Post
I have a 5x7" enlarger with two 250w lamps. I suspect it would melt if it weren't for the (very noisy) fan.
It would have to be a well balanced fan not to vibrate the head - or a well braced collumn.

Theatre lights of 1Kw work o.k. continuously without fans so I personally wouldn't worry about running 250w intermittently without a fan.