Specification2 pieces of T8 F15W BL365 bulbs, length 435mm (about 18 inches), including pins 450mm, diameter 25mm (1 inch).4 spark starters are included.<br> CompatibilitySuitable for all 30W fly killers.<br> Efficient trappingBL365 bulbs with a wavelength peak of 368nm are most suitable for attracting flies, termites, mosquitoes, moths and other flying insects.<br> cautionThe inside of the bulb contains metal particles or gaseous metal that excite UV-A light, you may hear a clicking sound when you shake the bulb. We recommend that you replace the starter of the fly killer when you replace the bulb (Please ignore this for machines without starter).<br> Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-DIMEANI official store