I just bought an Exo Terra Small Heat/Light Wire Cage Clamp fitting for the Creamic heater/Bulbs. The Clamp cost £19.99 and the Infra Red bulb cost £6.99 (100W). It heats a large Exo Terra Vivarium (60x45x45) much better than the 7W heat mat I had on the side, as you would obviously expect, but you also gain the benefit of being able to night view with ease.ceramic heaters in theory last forever, but they take up more space/have more wiring than heatmats