CHEs are really only useful for dragons at night or when temperatures are really hard to get high enough.
A bright white light is really what they need. It can be a normal house bulb (incandescent) but remember higher wattage ones make more heat. Not sure compact fluorescent is a good idea as some have unsafe spectra.
They need the bright light near the UVB source. It promotes basking and constricts the pupils to prevent damage to the eyes from the UVB.