Spider farmer advertises 2.5g per watt I'm not sure if you can get to that but after adding a sf2000 to my room my total went from an average 120g under a couple blurple 113w each to 528g on the 1st round and I'm drying about the same amount now so don't have a weight yet. The efficiency of the new LEDs has changed all the numbers you can easily power a 4x4 tent with 400w of course I'd rather have $1000 650w light. I just bought another sf2000 and a 4x4 tent in hopes of controlling the environment a little better than in my closet and add another 1/4 - 1/2 pound 🤞 seeds have sprouted and are in cups 🤞