PRO: You know this works... When you hear the LOUD zap that comes when a bug gets killed. I can hear the zap from halfway across the house.
PRO: UV light bulb is a standard 15Watt U shaped bulb which is sold literally EVERYWHERE (鶹 sells them as well for $6 each). So replacement bulbs is NOT hard to find when it burns out. Doing the math, if left on 24/7, the bulb SHOULD last around 200ish days.
CON: Only down side to this is no off switch for the bug zapper. Plug it in and it turns on by itself, unplug to turn off. The switch that's on there is ONLY for the light.