Zoo Med Professional Series Dimmable Clamp Lamp Black 8.5 inThe perfect all in one solution for controlling heat lamps and ceramic heat emitters. Inline dimmer switch allows you to adjust from off to full power and anything in between. Heavy duty ceramic fixtures can handle up to 200 watts. Turn heaters down on a hot day and back up in the evening, change temperatures seasonally without changing bulbs, or just improve lamp life by running them at lower power.