This automatic bug killer releases powerful attractant ultraviolet rays through two x10W tubes, which attract and destroy flies, mosquitoes, and other flying insects in seconds The light bug killer emits is, bright enough to attract insects but not so bright that it will wake you up in the middle of the night The bug killer includes two ultraviolet lamps that are particularly designed to attract flying insects, a safety guard to prevent people and pets from accidentally contacting the grid, and a chain to help hang it