Ok, I have a room for growing. First I want to set up my lighting system but I do not want to put any holes in the ceiling. So I though about building a PVC flat canopy. I just need someone opinion in best way to layout lights and to hang them. Or should I use 2x4. I don't know they weight limit of PVC but I use led lights and the room is well ventilated. Needs some ideas on how I should set up. Greatly appreciated.