forgot to turn of lights!!

i just started flowering 4 days ago and today before work i forgot to turn them off. They got 9 hours of extra light.

Will this severely stress the plant?

Should i turn the lights of now or wait till next time?

Shouldnt be a problem. Just turn them off for now and maybe get a timer.

i just went to home depot and got a basic one

Definitely get a timer. They are cheap.

Yeah you will be fine just resume they cycle.
We get power outages from time to time and survive them