What are blacklight “bug zapper” traps?
Blacklight traps use a bluish colored, near ultraviolet light to attract insects. Insects that are attracted to the light source are then are either trapped in some sort of container, electrocuted (“zapped”) by a high voltage grid, or stuck on a sticky glue surface. “Bug zapper”-type traps always use the black light to draw insects to a high voltage grid where they are “zapped”. Manufacturers claim that mosquitoes and other biting flies are highly attracted to these traps, but see the study cited below.