If i use 1x 300w mars hydro led and 1x 400w mars ll hydro led in the same tent (4x2) would that be ok to grow 3 plants and have them tooped with LST and if so would i have to set up the lights at diffrent heights through veg and flower?
You'd be crowding them . Not sure what tooped is though ? I'd grow 2 plants , pinch the tops a couple times and let them fill the space Here is a helpful site with all the answers How to Grow Cannabis in 10 Steps | Grow Weed Easy
I agree with the dickie fickle man. That's crowding them. If you want to go straight into flower, then maybe, but i wouldn't.