I have a Graflarger, and when I burned up the power supply for the coldlight I replaced it with a CFL in a box, reusing the base of the Graflarger that attaches to the camera and holds the diffusion glass and negative holder. The CFL gave such a contrasty image I had to use a "0" filter for a normal print, so I switched it out for a 60w soft white bulb. I worried about heat, but so far no problem (I don't leave it on long). To me, the incandescent lacks contrast, but perhaps I just need to get used to it. Anyway, its better than the CFL. The Graflarger looks like this now:

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