Closet Growroom not finished yet.. tips and suggestions

watsup everybody this is my cloest with 150 watt hps..it is exactly 5 ft wide 8ft in hieght i think its plenty of room anyway how high should the light be from the top of the plant?? I have a rubbermaid tote with my NL growing under some cfls.. i plan on taking 10 clones from it...at what height should i let her grow too before i start to take cuttings...also plant in pic is a snowhite crossed with williams wonder called snowryder..its an auto.. and im am going to cover up my carpet and get some fans i dont wanna cut any holes but i can cause my attic is right on top of my closet..any other options for ventilation.. any tips plzzz

Put your hand under the light, palm downwards. Move it so it's warm, but not uncomfortable. That's the point your plant should be at.
Get an exhaust fan sucking air out the top of the room and leave a hole or something near the bottom for fresh air to come in, to keep temps in check and supply the plant with fresh air.
Cuttings can be taken from when the plant is about 4-5 nodes high (a node is where branches come from the main stem) but it depends how big you want to take the cuttings. Imho the bigger a cutting you take, the better it's chance of taking root, as it has to use it's leaves for food while it grows some roots to absorb nutrients.
Mine are usually 6-8", and I can't remember having a successful clone that was less than 4". Others say they take small cuttings so it could be my methods, but large cuttings work for me, every time.

i would bump up to at least a 400 watt for that amount of space if not go 600 and some fans