Re: DIY light source for 10X10" enlarger.

"jch" <jch@[EMAIL PROTECTED]
> wrote
> Would one of the Fulham (http://www.fulham.com/)
line of electronic 
> Workhorse ballasts be suitable for powering lamps for a cold light head?

I don't see why not.

Fluorescent bulbs and their ballasts are not optimized for graphic
arts applications.  It doesn't matter what you use, though a
high-efficiency instant start ballast is probably the best choice.
There is some anecdotal evidence that electronic ballasts cause
premature blackening of lamps designed for magnetic ballasts.

With standard fluorescents you may have to keep the lamps on
and use a shutter on the enlarger lens to get really consistent printing
results.  A compensating timer won't do a complete job of mitigating
lamp warm-up.

-- 
Nicholas O. Lindan, Cleveland, Ohio
Darkroom Automation: F-Stop Timers, Enlarging Meters
http://www.darkroomautomation.com/index2.htm
n o lindan at ix dot netcom dot com