solarwind <x.solarwind.x <at> gmail.com> writes:
> > Incandescent bulb are crappy light generators, but very cheap and effective
> > resistive heaters.  40 to 75 watts of incandescent bulb will get you 39 to
> > 73 watts of heat or so.
> 
> Wow. Time to make a light box. Damn ya learn something new every day.

Actually an incandescent light makes for a crappy light box. Use an energy
saving 'electronic' lamp for that, and a diffuser (calque drawing paper works in
a pinch). As Olin has noticed, the incandescent bulb provides both light and
heat, and about as much heat as an aquarium heater provides, which is about the
right size for that kind of etching tray job.

Peter


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