Zoo Med’s most popular Clamp Lamp fi xture is available in three sizes: 5 1/2 inch (14cm), 8 1/2 inch (22cm), or 10 inch (25cm) diameter domes. Made of heavy gauge painted aluminum. All three models have a ceramic socket, and can be used with the Clamp Lamp Safety Cover to protect your bulbs, animals, and home. Upto 100 watts