Reminds me of that Dead tune Loose Lucy - Round and Round and Round...

Most people here are small growers. That is one of the appeals of this site.

Just b/c he works for a grow shop doesn't make him an expert. His comments on lumen output indicates he is giving an answer that has been heard by others. I'll give him coverage and penetration but those are issues that can be dealt with via super cropping. On the downside of HID lighting he failed to mention the costs - electric consumption and bulb replacement. He also failed to mention increased fire hazard.

I am going to leave it to others to point out other flaws in his answer vis a vis lumens as they will cover it much more accurately.