For basking you could use a 50-60 watt housebulb.
wow ok good to know. what wattage bulb would work best in a 2X2X4??
that kind of depends on what your ambient room temperatures are but it doesn't really matter on the wattage of the bulb as long as the temperatures are right. just buy a couple of regular household bulbs at different wattage's and see which gives the the best temps.