I bought this and it worked fine for a couple of months. Then the fluorescent bulb starts to loosen up that a little wind and the prong slips right off . While the mosquito is out there supposedly getting zap but instead feeding on me while I'm trying to push this fluorescent tube back in place. I've done that for a few nights now and fed up with it.  I bought one for 1/2 acre of the same brand and that one never gave me any problem.