Fangrui Product Details [fit Models]: T8 10w Bulbs For , , , 20w Electric Bug Zappers. No. 97341-chn-1; Please Measure And Confirm The Bulb Size Of Zapper Before Purchasing [365nm Wavelength]: Use A Wavelength Of 365nm Ultraviolet Light Because Bugs Are Particularly Attracted To Light In That Range; This Specific Wavelength Falls Within The Uv-a Spectrum, Which Is Known To Be Highly Attractive To Mosquitoes And Other Flying Insects [long Lasting]: Long Lasting Bug Zapper Uv Bulbs, More Than 3000 Hours, In Order To Achieve The Working Effect, It Is Recommended To The T8 10w Uv Light Bulbs In About 3-4 Months Of Continuous Use [bulb Size]: You Receive 10 Pack Bug Zapper Bulbs; Bulb Size: 13l X 1w X 1h Inch, Total Length Including Pins On Both Sides Is 13.5 Inch; Wattage: 10w Colour:as Shown Material:glass Package Contents: 10 * Bug Zapper Light Bulbs(there Are Differences In Printed Words) Only The Above Package Content, Other Products Are Not Included. Note: Light Reflection And Different