The Zoo Med 40 W Nano Dome Lamp Fixture is constructed with durable materials, perfect for terrariums 10 gallons and under, featuring one ceramic socket. This fixture is suitable for small geckos, hatchling reptiles, amphibians, tarantulas, insects and other invertebrates. Strictly use this with Zoo Med's Nano heating and lighting products only. Utilize the easy to use flip switch on the power cord in order to safely turn your fixture on and off. This quality product is supported by a 1 year manufacturer's warranty. (Lamps not included) 4" bottom diameter