To be quite honest, I have seen some grows that we're pretty awesome with 400watt or smaller. These guys are some of the best LST & SCROG growers I have seen on here!! As for myself, I start plants indoors in early spring under T5's and then move them outside last week of May, so I guess I'm not a "real grower" either, lol. Pretty sure the sun puts out more lumens than your tiny little 600watt bulb! I laugh at your idea of a "real grower" haha
but for real, is there a big difference in the quality of bud if it is grown under a bigger light? And Ice by Royal Queen Seeds was my favorite for flavor the last year I grew.