Wendy,
At the begining of the thread, you recommended a MV bulb. I'd like to caution that studies have shown that these bulbs may very well produce a UV ray intensity which is too high for prolonged exposure in situations where the animal is unable to escape the rays, notably, small enclosures. Studies have also shown that it is highly possible that chameleons self regulate their UV exposure, much like they self regulate their body temperature. For these reason, I would not recommend a MV bulb except for large enclosures as their intensity and distance they radiate their UV rays is potentially far too great for use in anything but extremely large enclosures. Furthermore, the chameleon should be allowed to regulate UV exposure and access to heat independently without being forced exposure to the other if it is not desired.
With regard to a heat bulb, I don't recommend ceramic bulbs either. Chameleons increase their body temperature by basking. This is induced by energy from light rays. If you use a ceramic heater that does not produce visible light, the actraction to that heat source is compromised preventing or potentially limiting natural attraction behavior used in thermoregulation. Instead, I'd recommend simply using an incandescent bulb as a heat source.
Next, what are the temperatures in the area the cham is kept in at night. I doubt that a night heat source is needed as these animals do benefit from a fairly significant temp drop at night (below room temp).
Lastly, it seemed like you were condoning keeping a pair together in the same cage. Keeping chams in groups is not wise.
Regards,
Chris
