"any grower having compared yields between the most advanced LED and the simple HPS will attest to the compromise in yields"

Which is to say, EXACTLY NOTHING.

Those other 'tests' are done by non-scientific, non-professional garage growers that are using a mass-produced copy of outdated 90s LED research.

Grams per kilowatt-hour, LED wins all day every day, across every crop ever tested in a truly professional and scientific setup.

Like this:



To this:



To this:



All day, every day.