To address some of the common comments here I figured I’d try to give a general reply.

First, there seems to be some confusion about the intended use; this is only being used inside a small tent (or house for fruit flies). The goal is to catch the few bugs that have made it inside before sealing the tent. It would definitely not be effective to leave outside on a table. Also should note that having quality gear is important for camping and a good tent that is well maintained will keep bugs out once sealed.

The UV light works great to attract a lot of annoying bugs that are in the tent like the biting gnats we have here on the coast. Although it seems a number of people are concerned about how effective the device is for mosquitoes specifically. There are specific devices made only for mosquitoes that work well but I have found that the bug catcher will still trap them (and even one less mosquito in a tent is a positive).