When would y'all personally flip?

I have 4 photoperiods surrounded by autos to just fill in whatever space. The photos in the middle are in 5gallon pots , super soil. Under a Mars hydro Fc-e3000 and Maxisun PB1500. I can raise the lights about 5 more inches. Any personal opinions on when you guys would flip? Lights in the picture are 25 inches away. I was seeing how high I could get it. Had about those 5 more inches I could squeeze. First time doing photos and I've seen some crazy flower stretches. Cheers.

Duplicate thread. I responded on your other thread.