【 Bulb size 】9.9L x 2.3W x 1.14H inch, total length including pins is 10.5 inch.
【 For Flowtron models 】BK-40D (not for BK-15D or BK-80D), and other bug zappers using 10-inch bulbs
【 Effect 】Professional 365-nm wavelength.
【 Lifespan 】In order to achieve the best working effect, it is recommended to replace the bulb in about 3-4 months of continuous use.