[adamanteus]

Under floor heating is far superior. By using heat cable or mats you can provide ambient overnight warmth without sacrificing the photo-period, it is also infinitely more controllable with a thermostat, than a light bulb. If you use a light bulb and contol the temperature using a thermostat the light is always going on and off. I light my vivs with flurescent lights which provide no heat, however the snakes don't realize this and they bask in the light, in full view anyway, even though they are being warmed from below!