Ceramic Heat Emitters emit infrared heat in a uniform pattern. They do not give off any light and are resistant to humid areas. They will not crack when they are exposed to humid air or if water is splashed on them. Ceramic heat emitters have an extra long lifetime and can last up to 20,000 operating hours, which is about 20 times longer than incandescent bulbs. Ceramic heat emitters are available in 100 W, 150 W, and 250 W.