If you have a bug zapper up, it's time to take that shit down.
A landmark University of Delaware study (Frick and Tallamy, 1996) counted nearly 14,000 insects killed by residential bug zappers over a single summer.
Mosquitoes were 31 of them. A mere 0.22%.
The other 99.78% were moths, beetles, midges, fireflies, and the night-shift pollinators your yard depends on.
Mosquitoes don't navigate by light. They find you by your carbon dioxide, body heat, and skin chemistry. Your bug zapper is invisible to them and lethal to almost everything else.
Harvard Medical School's Zika page specifically warns against bug zappers because they may increase mosquito populations by killing the predators that eat them.
What actually works: eliminate standing water within 100 feet of where you spend time outside.
Bug zappers are 1970s technology built on a 1970s misunderstanding of mosquitoes. It's time to take it down.