harvested 7 more OZ from the last three in the garage ( ice box). total from those six plants was only 15 oz so about i/2 gram per watt with those two 1200's. Both lights needed a dozen replacement diodes and the oldest light (4 years) blew out a bank of diodes. It was not the driver, not sure what, maybe board or wiring, dunno) . . Hoping for better numbers in the 144 grow (better environment about same amount of wattage 900w). Those 144 seem to hold up better than the 1200's. Those 1200's did get up into the nineties F last grow when I was trying to deal with cold temps at night lights off. Temps would go from high 80ies down to fifties. I put a big circ fan in and that helped a little but still hard to control temps in drafty space. Prolly need to wrap the whole thing in foam board and tyvek.