Iry is correct on my yield....in a 3x3 tray...450w of LED will flower a 4x4 very easy increasing the growing space by 44% so yield is a variable...as per yield per sq ft of growing space i am getting approx 35gr per sq ft....that is probably the most accurate way to determine yield!

thanks Weez...you got me rollin bro...just like you...a little co2 never hurts

Thc~ hit my yahoo and i got the best deal on these lights for ya :thumbsup: