the expensive LED makers use multi- band LEDs like viparspectra uses and many of these manufacturers claim that plants can only use 40% of the light produced by white LEDs. if this is true than that 165LPW that some COB boys claim only gives 66lpw of usable light to the plants. you can find grow journals here using every kind of light including viparspectra and COBs. review those grows to get an accurate picture of what each kind of light can do.in these grow journals I don't see much difference between these lights and have only tasted weed grown under 4 band leds (450,630.660nm and white leds)and the quality was not impressive. weed grown under HPS,CMH or even fluorescent had better flavor and effect.