600w hps or 600w of cmh?

Less yield per watt from CMH is what I understand. Many have said CMH will be fluffier- but possibly frostier. Im doing my first ever cmh run this winter, 630w in a 39''x39'' tent. 57w/ square foot. This will be running next to my 5x5 with a double end 1000w HPS running 1100w (44w/sqft). I will be able to tell you more in about 4 months.
 
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