My mate's an idiot!

It shouldnt stress them to bad from my experience and knowing people that grow. whats wrong with keeping the cycle their on already? if ya wanna look at em just look at em after 10pm or is that too late(job issues etc) i run a timer for my light schedule and i got em on a 18/6 atm to get a bit more height although the dude that i got it from had em on a 12/12. threw em from flower back to veg and theyd been on 12/12 for about 5 days. Had a few issues with it but nothing too serious. going to put them back on 12/12 here on friday.

Having the lights on at night is better anyways...cooler time so the room won't get as hot.

yeah i run at night here in my state b/c during the day its 97 outside at night 80. but anyway in your case you be ok to get the plants on your schedule.

if u want to change the lights back so they come on in the day just leave em on till its a good time for u to turn them off ie 8pm. just dont give them any more dark time and you should be ok.