You could use a bulb that doesn't produce heat, or if the room he is in is bright enough that is ok to. These guys don't just sit out in the open during the day they hide in the shade or burrow to get of the direct light, so it doesn't have to be super bright inside the tank. I have an albino and all I use is the light in the ceiling, turn it on at 9am and off at 9pm and this enough for him to realize its daytime. And its just 2 60 watt bulbs in the ceiling fixture.