Ok so I have asked about these a little before but don't know if I ever got to talk to anyone who has used them. Apparently 35-45 watts per square foot of LED's is what is optimal in most cases. I have a 2' x2' high output t5 fixture that takes 8 bulbs... And I'm also doing 2'x2' scrogs. Why would 8 led bloom bulbs not be just about perfect for this? They are 21 watt bulbs which puts me at a very evenly spread out 42 watts per square foot.