Bug bulb Light Zappers on the other hand not only attract bugs but also kill them effectively upon contact with the electrical grid, ensuring that they are eliminated from the environment. You probably don't want bugs in your home unless you're a professional entomologist. You can also place it on a countertop surface. Bugs are attracted to the yellow light emitted by standard light bulbs. We can now enjoy our time outside without constantly swatting at these pests. Switch out your light bulbs for LED lights--and pay close attention to the color. Once installed, and powered on they operate automatically, attracting and removing insects without constant monitoring. It is only one out of many. Batteries for battery-operated devices should be in good condition and properly inserted. This is just a little bit more than what you would expect from a 40 W incandescent. Boundery is an outdoor gadget company that created the Bug Bulb, which costs $39.99 per zapper.