you can grow seedlings under hid lighting but it needs to be atleast 1-1.5' away from the tops of seedling.

on ventilation look at diy airvents, or you can use pvc piping. you dont want any light leaks period.

pot size depends on how long you veg for or how long they grow for. you want about 1 gallon of soil per foot of plant

mylar is expensive and gets dirty fairly quickly. flat white paint is great and cheap to work with

on the floor of your closet i would put some heavy plastic(painters plastic)

temps should stay around 70-80 is optimal

good luck and read
texas grass Reviewed by texas grass on . 1st Closet Grow - Supply and Setup -Help please :) Hey everyone this is my first post and I want to remain somewhat discreet but I will give as many details as possible. First, closet grow space, I believe the closet is about 5x6x3. There is no door on the closet at the moment so I'm not sure what the best type of door i should put on it. Now I understand the cycles fairly well but I need help learning how the ventilation system works. Setting up I will have a 400W HPS light with ballast. (Can I grow the seedlings under this or should I Rating: 5