[Fit Models]: T8 10W replacement bulbs for 20W electric bug zappers. No. 97341-CHN-1; Please measure and confirm the bulb size of zapper before purchasing [365Nm Wavelength]: Emits 365nm ultraviolet light, which is highly attractive to mosquitoes and other flying insects; This wavelength falls within the UV-A spectrum known for insect attraction [Long Lasting]: Long-lasting UV bulbs with a lifespan of over 3000 hours; For optimal performance, replace every 3-4 months under continuous use [Bulb Size]: Pack of 10 bug zapper bulbs; Bulb dimensions: 13L x 1W x 1H inches; Total length including pins: 13.5 inches; Wattage: 10W Color: As Shown Material: Glass Package Contents: 10 * Bug Zapper Light Bulbs (variations in printed labeling may occur) Only the above package content is included; other items not included. Note: Lighting and display differences may cause slight color variations between image and actual item. Measurement tolerance: +/- 1-3cm.