I think they're pretty high voltage / have a guard to stop humans touching the conductor?

We used to have them in a lab I worked in and occasionally a larger insect (e.g. wasp) would get caught between two rows of the grid and you'd hear it spark / them cook...

There's variants where the light is in a location that is hard for insects to exit. I've seen 1) fan causing airflow that's hard to "fly upstream" in 2) funnel shapes that make entry easy, but finding the exit hard. These avoid the zap aspect, and use less power (LED and maybe fan).

They're not kidding when they say full either. I'm in Western Canada and mosquitoes are essentially the unofficial national bird. They big, aggressive, and numerous. Literally handfuls of dead mozzies after running that thing for a few hours.

Is also why I started putting up bird feeders and nesting areas -- they control insects including the mosquitoes, and after seeing just how many were out there...

If your house is sealed tight you can build a bat house, hat will control mosquitoes too.

Be careful.

Bats can contort to fit almost any hole in the house. They are effectively tiny mice.

And just like nice, they make noises with their claws when they get into the walls (they will ryn when not airborne and quite fast too)

And their poop will bring hordes of cockroaches....

Have a link? There are many that I think are just gimmicks. Yours sounds as though it works. Thanks

Zapping insects spreads a lot of germs into the air. There are newer versions that suck the insects in through a fan.