There are a number of bug zappers for sale.  I have a flowtron that is 12 years old and still works perfect.  I needed a second one for the other side of the house and I could not find a flowtron locally so I bought abother brand. It hardly drew any bugs to it and when it did there was no way for them to fall out through the bottom.  I took it back and got another brand, same problem except it wouldn't zap them enough to kill them.  I took it back and ordered the flowtron from Amazon.  It is in use and just like the one on the other side of the house works perfect. Don't waste your money on wanna be bug zappers, these are the best and last a long long time.  I have the original bulb in the 12 year old unit.