Hps side was 1060 ppm last night and tonight is 1020 with 900 going in from the top off.i think I found there sweet spot.
Cob and cmh side at 740 last night and 700 tonight with 850 in top off res.everything seems good to go for next 3 weeks of stretch and stack I'll maintain these numbers.
Scott's HPS
Cobs stretching like crazy
CMH
Left bulb melted on the inside so I had to put up a 600 HPS till i can order another one on monday and have overnighted.shit happens
Overall I feel like cobs and cmh are about even.the plants under the cmh have a nicer color and look cleaner.i think there really about the same except the cobs might produce more under growth due to multiple light sources over head.
Group shot