Would it hurt my flowering if I had to give my plant more light than normal for one day while I'm out?

Heyo! I rejoin what the fellow growers wrote down here. I simply add that it might stresse your plant and cause her to be a hermi (hermaphrodite) so if you get a lot of bananas later on, you'll know that your strain is very sensitive to such a small difference. What happens if I can explain it this way is: Your plaint checks the difference of light which causes a stress. If the stress is intense, she'll think "holy sh*it I might die soon and I'm not done flowering/seeding." She will the automaticly pollenise (spelling?) Herself, (creating seeds) to prevent the genetics. Voilà ! But i guess one time is no time... Happy growing to you!

If it is only 1 day it will be fine

Probably will be ok but there's a chance to send her into re-veg. Best just to grab a timer, there fairly cheap for the job they do.

If it's only an extra 12 hours, you'll probably be fine. The plant will start to reveg but you wont notice any difference in the end. If it's more than an extra 12 hours, you're probably better off keeping it in dark for the extra time. Personally, I would run down to your local hardware or superstore and just grab a timer. You can get them for under $10.

Hey Mate, What exactly do you mean? Extend the number of hours of light for one day? OimRausch