I don’t bother, nobody did this when i started out growing. I do know a grower who says he got an increase - in bud rot 
Hehehe, yeah. You gotta run your room the same and keep the fans and dehumidifiers running.
Now cold temps at end and during dry i do see benefits to. Dropping the temps last week or 2 during flush. Just dont chill em to point of stall.
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Yeah i only run the 12 hour dark cycle then harvest. What temps usually stalls them?
Low 60s with cold tap watering sometimes stalls em. Might be the tap water though too.