If You Flip Will It Hurt Them?

If you have you have Photos and Autos in the same Tent Autos not quite ready and you what to Flip for the Photos.

Will it hurt the Autos?

You'll lose a little weight vs running 18/6 or more, but it won't really "hurt" them. They will still mature.

This is why I don’t do both autos and regs, the auto’s will want less ppfd and longer light cycle (like in nature for autos) , where regs can be flipped from seedlings also but need to be triggered under 14hrs to work. I would suggest if ur got a 2nd room aka veg room to have ur auto’s in veg room cause that cycle on/off is better and also lower ppfd like a auto would like aka light intensity. For autos I would do 16-18hrs, 400-500 ppfd (like a veg staged regular ), also feed light and not top auto’s, also autos hate multi stage up-potting and can make the auto trigger way quicker so I suggest 1-2 stages of pots and that’s it for autos and not to top em