I just acquired 2 melamine enclosures. They both have melamine floors with the only glass being in the front. The large one has a circle cut out of the top with screen for a lamp. The smaller one has a light fixture mounted inside of it. Would the best way to heat these be from heat lamps from above? I've thought about maybe suspending a plexiglass floor in the bottom so I could put an under tank heater and thermostat in. Would this be unnessessary? Would strickly heating from lamps at the top dry out my humidity?