I got fucked by the last time change becasue I have a digital timer with time zone built in it and didn't realize I had it set to automatic. This time it was set to manual and I left as is so not to have any interruptions with my 12/12 schedule.
if my light cycle is was at night then no i wouldnt. mine is during the day so yes i did so it would not be so light outide when the lights go out. i like to leave my window open to allow the sunlight to fade like being outside.