Hey you twos, KP and CJ. CJ the temp change can cause streching, but if you have the room it is not too bigg of a deal IMO, but with the temp changes it can throw some other stress facters in the mix so that may be a bigger reason to kind of try to keep the room stable, but I have had 15 and 20 degree changes at times that didn't make or break me, it can also be strain dependent on how the plants will be affected. One thing about a stretch in late flower is that the plant is putting in energy into the stretch that it could be putting into bud development.
Adieu