We live in an area with a LOT of mosquitoes.  I mean, a LOT!!  This bug light helps.  It functions even better when you use mosquito attractant, but the light itself did help.  It has shorted out a couple of times, causing the safety button on the outlet to pop, but when we checked, both times a small tree frog had gotten into the light and committed frog suicide by electrocution.  Other than that, it has worked quite well, without significant buzzing noises or flickers.  It seems more like a porch light than a bug zapper.  I do recommend the mosquito attractant, though.