[harmless smoker]

i have built a grow closet and the dimensions are 46"L x 24"D x and 60"H. i allready have one plant in there and she is 18 days or so into flowering, and i just recently took a clone yesterday i know it is kinda late in the flowering to take a clone but i just wanted to really try to get this cloning thing down. so anyways the question i was going to ask is,

how many plants can i fit in this size and would a 400 watt be good enough or would a 600 do better????