Here at Jay's Exotics we use these for every small enclosure. 
 
Zoo Med Nano LED Lamp 5 watt
 
Zoo Med's Nano LED Lamp provides a long-life, energy efficient daylight LED Lamp. It promotes live plant growth and is a bright, naturalistic lamp for Nano-size terrariums Ideal for small geckos, hatchling reptiles, amphibians or invertebrates or tarantulas.