Amazon has Flowtron BK-15D Electronic Insect Killer, 1/2 Acre Coverage for $19.98.
Electronic Insect Killer 15-watts: 1/2 Acre Radius
Advanced electronic insect control; non clogging killing grid; 1/2-acre killing radius. Instantaneous operation, continuous and uninterrupted service. Uses a 15-watt bulb. Measures 9.2 by 9.2 by 13-inch. [ Shop Now ]