sorry folks i read what i put up & could be misleading.
the 660 reds are want you need for flower --- any lower on the red 620 or whatever is good for veg 7 clone only in my reading and use.
no grow journal, just watching how different strains do . ak-47 ,nyc diesel ,cheese ,bubba and others do nice, i don't have a camera but they look as good as in the mags .and smoke works .
some folks out there are playing with 3 or 5 watt bulbs . others are saying 1 watt works just place more around for more points of light.
i use 1 -90 watt per plant and throw in a 400 hps for each 6 plants lately ( mainly to help heat room) because i can.
but ones i have grown only on led have convinced me they work.
use multi colors though. 2nd --3rd --4th gen all have blue ,orange etc to get fuller spectrum , the trichomes are sweet.
i end this by :there are a few folks who have smoked my meds that are now using leds.
they are more exspensive ( some good prices ,but LOOK at specs) but looking at power used in room with number of points of light i won't quit using them ,,live well