【 Bulb size 】7.5L x 1.78W x 0.9H inch, total length including pins is 7.8 inch. 【 For Flowtron models 】BK-15D, BK-2000, GL-1450, GL-2020, GL-2050, GL-3515, PM-1500, PM-2000, PM-2015B 【 For Stinger models 】UV15, FP15, TZ15 【 For Black-Flag models 】BB-15WHT, BZ-15, BZ-20, B1515 【 For other models 】K15, X3, T6, T8, T9, Hemiua Zap T6 Pro 【 And more 】Can replace most bug zappers with the 7.5-inch U-shaped 4-pin Base Bulbs. 【 Effect 】Professional 365-nm wavelength and UV black light. 【 Lifespan 】In order to achieve the best working effect, it is recommended to replace the bulb 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. BF-35 Bug Zapper Replacement Bulb 15 Watt for Flowtron BK-15D, Black Flag BZ-15 BB-15WHT, Stinger UV15, FP15, TZ15 B1515-4, Hemiua T6, T8, T9, U-Shaped 4-pin, 2-Pack