Hey green geens if the power does go out to keep your photoperiod going you can just hang a flashlight in there or light a candle. If we can see the light they can pick it up. So just don't fuck up the schedual. I'll do some more reading for you about emergency situations and see if I can find anything else for you. Your plants are looking good and 81 isn't a bad temp. In my flower room we get up to 83 without being stressed. Just take care of those kids first if the lights go out.