I'm relatively upbeat about Chinese lights. I think they can be a good choice for someone unwilling (unable) to invest in a better quality light with more efficient chips *as long as they understand the light's shortcomings*. But, a 300w LED is going to be about 200w actual. If your brother got 392 grams that's 2g per watt. From a Chinese light.my brother has just finished a grow with a 300w chinese led and he did pretty damn good ... think he was 2 ounces shy of a pound
I'm sure he got good results, perhaps in the range of 1g/w. But, 2g/w sounds like some fish I've caught.
Which light did he use? It's good to know which ones produce well.
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