When to switch to flower

They look y’all enough to flip , all depending on your space , plants will typically double in size once flipped to flower . But to be honest it looks like your having a cal mag deficiency with the yellowing and brow spots on leafs. You might wanna up your calmag before flipping.👌🏾 Hope that helps

Hello, I'd say flip them here in the next week. Lets just say they double in size being about 2 feet, plus the height of their pots and the space needed for the light and the space between the lights. You don't want to risk it being too close and getting burned. They're beautiful and healthy looking, do a nice cleanup of bottom most shaded branches and leaves after the flip and the rewards will surely be great. Happy flowering. ✌️