I know I'm going to sound like a big meanie, but there's
no excuse for entering the grow space after lights-out
It's almost impossible to go about doing this regularly, without damaging the yield, or interrupting the bloom phase. It's hard to even gauge just how much damage you've done, unless you compare side-by-side what your specific environment can produce, without darkness interruption.
Do your work during the day. If you can't? Set the light schedule up so you can... if you're at work all day, let that be their night time, and have them go on when you get home. So long as their night time temps are still cooler than their day time temps, you're golden.