After writing my post "LED lumens, again", I realized
that "how much", regarding "I get so much yeild" was,
itself, a useful statistic.
Under HPS, people used to talk about the achievable
goal of 1 gram (dried) per watt per grow season. I
never got much more than about a half gram per watt.
But now, with these claims of 1/3 the power of HPS
for their LED lights, someone should be achieving
3 grams per watt per season.
Let's hear your numbers, guys. This should be beyond
hype, and relates to money.