I don't think I've seen those. Do you have a link?

If your're talking about something around your home, we have a Mosquito Magnet. Sadly, we got a discounted floor model which may have had non-working parts, but we got a replacement just in time for all the bugs to go away! Hurrah! Anyway, I'll see how well it does next year. It's supposed to be very effective. We really need it around our home. We have a wooded lot, we're at a fairly low level, and about a mile away from the Patomac. We get a lot of those little blood suckers.