Not sure It seems like it wants to work, but haven't noticed any less bugs than before.

No More Bug Bites I hate having mosquitos come in the house every time we go in or out the door. I got this bulb because it's a dual purpose bulb. It works as a regular light source, plus it has the bug zapper on the top of the bulb, so whenever a mosquito or flying insect sees the light, they are attracted to it and fly right into it. One little zap and that bug is history! I don't even have to grab a fly swatter! The bug bulb lasts all season and it will keep those pesky insects away from us when we are outside and also when we are going inside. Score!