Zoo Med Nano Dome Single Lamp Fixture, 40 Watt Zoo med's nano Dome lamp fixture is a very small lamp fixture for nano-size terrariums that are ideal for small Geckos, hatchling reptiles, amphibians, tarantulas, insects and other invertebrates. For use only with zoo med's nano heating and lighting products (lamps not included). holds up to 40 watts. Small lamp fixture for reptiles. Built to provide UVB penetration at greater distances. Ideal for small geckos, hatchling reptiles, amphibians, tarantulas, insects and other invertebrates. Designed for up to 40 watts and use with heating and lighting products from Zoo Med.