i always heard UV was good for plants too. (plants do grow well outdoors)
i always heard leaving in the dark was good at end. ( )

I just hope my plants don,t freak out though. Cause I for sure heard that leavig the lights on for two days when you have two weeks left is no good.
i am just assuming that it would be worse if it happend at the beggining of flowering. I just hope the trichomes rippen and make it to cloudy/amber.