you're not the only one who has the desire to grow with several different lights. i've grown with two different brands of 400w CMH (GE and philips), 315w CDM, 860w, 400w hps/mh, 1000w hps/mh, 250w hps/conversion mh, and three different brands of LED.
do you know what from that list gets the best (and most consistent, regardless of season) results? the lights with the best efficiency.
what produces the best quality? the plant with the best genetics.
grow krome's "the white" and you'll see what i'm talkin' about, 30%+ thc on that plant is a given!
if you want to grow better herb, get better seeds or clones. i'm not saying anything about environment because it's a given, and this conversation is pointless if you can't keep your room in the optimal temperature/humidity/gas mix range.
like i said, i'm all for light experimentation, but that 600w ceramic hps engineer needs to be fired and blacklisted. it makes 480w of heat from a 600w bulb FFS! that's what 20% efficiency means.