When to flip to flower?

When your plant is 1/3 of the grow height you have to grow within. Definitely can fatten her up from those photos for another week or two. Most of my plants in vegetation last 6-8 weeks. Then they are ready to flip.

They small for vegging time they won't yeld the amount you desire im afraid to say and the leds lights if 240w each will only pull about 60w each I'd get new better lights I just scrapped 8 plants for small growth and brought new light I now have around 8 lights all different lol happy growing but dont think they will yeald much myself

These seem really small for 11 weeks of veg. If you flip now, I have a hard time imagining a yield/plant you hope for. But to suggest vegging for longer after 11 weeks seems silly to me too. That’s a really long time to be vegging and have them be this small. I’ve never mainlined or grown in coco, so it’s hard for me to say for sure. I glanced at your diary and I’d suggest keeping an eye on VPD, and sticking to it best you can. I’ve done it for the first time this grow and my veg period was the best of any grow ever. But if I were you I’d probably just flip to flower and focus on a healthier veg next run. Or, use the photoperiod to your advantage if you don’t care about an eternity veg time and try and nurse them back to healthy, vigorous growth.