JerseyMike wrote:
....
... uses a bug zapper on a timer from dusk to about midnight and from
about 4am [to] dawn every day,...

As soon as springtime gets here in earnest and I put ours up, they stay
on continuously until taken down in the fall after the first killing
frost. Besides the nighttime critters it then works on various daylight
beasties (mostly moths, etc.) as well. I'll use some of the attractant
on occasion if there's a particular infestation but it's normally not
needed and somewhat expensive for continous usage.