ASPECTEK Insect Killer, Bug Zapper, Powerful 20W Electronic Indoor Fly Zapper, Mosquito Killer-Indoor Use Including Free 2 Pack Replacement Bulbs

Installation: Before replacing the bulbs, unplug the unit and release residual electricity using a screwdriver. Push down on the protective grate to access and replace the bulbs easily. Size: Each bulb is approximately 13 inches in length, fitting perfectly into compatible zapper models. Quantity: Pack includes 2 replacement light bulbs, each 10W, designed for 20W Bug Zappers. Compatible with ASINs: B09NM4WNJY, B01LWLFB5U, B00I0G0JXE, and B07F3NH96Q.