Week 8 flower light schedule mess up.

Just go back to your original lighting schedule, one extra long day of 19 hours during flowering won't cause any real dramas, it takes days of abnormal lighting schedules to mess with a plants flowering. Hope this helps, Organoman.

If you're growing photos, 18/6 is fine (19 hours was no big deal!)... If you're growing photos and you want to flip to flowering, set up a 12/12 schedule. If you're growing autos, 18/6 is fine ... again, 19 was no big deal... in fact, if you're growing autos, I'd tell you 20/4 is just fine for them, too, no matter what stage they're at... Relax! You didn't screw anything up and all will be fine!