I have found that poppies can grow to adulthood in a 20 oz plastic cup. you can put like 4 per square foot. with 4 or 5 poppies per plant that equals out to 1 gram of O per square foot. also I think they need less lumens than cannabis. I bet 1 1000 watt hps will cover a 10 by 10 foot area. hmmmm that equals 100 grams of O :thumbsup: