Mark,
The curing time seems to depend on the power of the light. The more powerful the lamp, the faster the curing. I have different battery driven lights and the one with the highest wattage does the best job. You can also get lamps to plug into a power socket for even more brightness and you can actually give the flies a final hardening in direct sun.
Regarding wavelength the manufacturers of course recommend their own lamps, but my experience is that they actually cure each others resins quite fine.
Martin
