I grow in a shed but dont have any light leaks so bugs are not a problem for me.
I get 40c and over summer day time temps. Rather run the light at night as its a little cooler. (granted im only running a CFL so dont have the heat generation issues you would. I use the light at night in winter to help keep the plants warm as it drops to -c here.
The hot days dont bother the plants to much as long as they have enough water and good airflow. In general most strains come from warm-hot climates. My out door plants in previous grows have seen 40c plus days (and 30c plus nights) for a week or more. They quickly adapt.
See in the winter I like to stop my extract at night to keep the heat in
if I ran my lights at night in the winter the air coming in would be very cold it could cause issues
plus I`d get mad condensation on the pipes
someone might see the lights
Also I work on the grow during the day most of the time unless I`m spraying, in summer I can turn the lights off or some of them when I`m working
In the winter the lights keep it nice and warm when I`m working in there
Don`t think I`d enjoy going there during a cold day to work in the cold and the dark
plus it suits my water boy, he`s a lazy fucker but normally he manages to be away between 6am and 6pm to poke his head in and check any issues
If I was drawing 2x the electric or more or the heat would have got 5c or more this summer than yeah I probably would have to run the lights at night, kinda glad I don`t tbh, bugs and someone might notice it, I mean at least one of my box fans is mounted right to the wall kicking air out gotta have a light leak around that atleast, lol
