Hmm are you gunna add supplemental lighting for flower or just see how she does? Either way I wreckon you'll do at least a gram a watt based on how good everything is going so id expect at least 165 grams if I were you!It's a 220w on paper but supposed to pull 165w at the wall. I don't have anything to verify but from everything I've seen and read online from the manufacturer, that's what they claim.