Plants dont know OR care what time it is. For them, it is daytime when the lights are on and night time when it is dark. So, it will be hotter when the lights are on(day) and cooler or nearly the same when the lights are off(night). I leave the A/C and fans running 24/7 so that keeps the temp cooler during the dark cycle.
for me its impossible.i always have high night temperatures sometimes higher than durin the day.i think its cos i close the window for darkness.