The Exo Terra TerraSky UVB LED (9W) is an energy-efficient LED terrarium bulb that emits optimal levels of UVA and UVB for plant growth and reptile health. This 9W TerraSky UVB LED is ideal for nano or small terrariums, providing necessary UVB for calcium metabolism (especially in planted or bioactive setups) while also delivering bright, natural-looking light. It’s an ideal solution for keepers who want to illuminate their terrarium and support live plants, all while ensuring their reptiles receive low-level UVB similar to dappled sunlight.