Does a bug zapper work during the hours of daylight?
No, nor do they work at night. The merely insects they kill are 'good insects' like moths. The nouns of zapping that you hear is not mosquito death, but beetle, butterfly and moth death. Put on some insect repellant and turn outdoors.
Technically it still does work during the day...but it's not as powerful. The reason why people use bug zappers is because of the bedside light. At night the bugs are attracted to the light source and zap they're departed. But during the day since it's bright out the light can't really attract anything because it's not adjectives that visible. But it doesn't magically stop working during the day...it'll still zap the vivacity outta any creepy, crawlin, and flying creature it just isn't as appealing during the day time. Bug zappers kill in cold blood all bugs who venture towards it, not only just the biting kind. Any light source brighter than the ambient lighting will attract insects. So yes, they work during the year, but they aren't really killing the insects you want them to. They make a cool swish though. Save your electricity and find an alternate way to avoid biting insects-bug spray, citronella candles, etc.
Answers: no it's light attracts the bugs,so it has to be shadowy,unless some bug goes in the zapper after it will zapp it,hope that helps.