I replied to you in the chatroom but you seemed to be away. My 2 cents.... Take the 6 larger plants, place them 2 x 3, 2 wide 3 long. Looks like that would be an area of 20" x 30", figure 30-80 watts per square foot. At 4.17SqFt that gives you 125-334watts. Depending on what you have for...