Northern Light x Big Bud autoflower

Whoa this one is very strong and grows a lot, and I fear she may stretch like hell as soon as she starts flowering. She's already in transition, so I'll see if I dont have to take on any severe measure to prevent her from reaching beyond-the-lights heights 🙏 Since I use this grow room for early vegetation and autoflowering plants, She's having a 24 /0 light schedule in this way: 18 hours 400 W, 6 hours 100 W. I hope this one starts to flower soon and that she won't take over the room before stopping flowering stretch. With these autoflowering plant I did almost all techniques together (Except FIMming and ScroG)