On Mar 20, 12:21 pm, glen herrmannsfeldt <g...@ugcs.caltech.edu> wrote: > Yes, but a 12V bulb won't be so bad. A 12V 2A bulb will start > to get a little orange, and should stay below 2.5A at 5V. > > Some day I should buy a variac, though. you can get them on Ebay for about $50.00 for a 10amp variac Rich