【Bulb size】13L x 1W x 1H inch, total length including pins on both sides is 13.5 inch.【Applicable models】FSL BL T8 F10W insect killer replacement bulb is compatible with most 20W electronic indoor insect killers, such as Asp-ectek, Li-Ba, Micn-aron, lu-lu home, etc.【Function】The power of one replacement light bulb is 10W.【Effect】Professional 365-nm wavelength and UV black light.【Packing quantity】Contains 2 electric bug zapper replacement bulbs in a box.【Lifespan】In order to achieve the best working effect, it is recommended to replace the T8 10W UV light bulbs in about 3-4 months of continuous use.【Fragile reminder】The light tube is fragile, if it doesn't work or is broken caused by shipping, please contact us to get new replacement.【Warranty】We offer 100% satisfaction service with 90 days free return and 7/24 hours after-sales service support.