www.a51led.com
You can get all your specs here. I am not an expert on all the tech, it bores me and my bad there. But I will say they perform as advertised, at least my SGS160 does.
My tent is about 4x4. I admittedly stretch the space for the light, though don't use it all by any means. I run 3 plants in 3 gal and one or two in a one gal on the outer light limits. I pull a gram per watt of dried trimmed bud.
My plants and yields wouldn't impress but keeps me full. Next run I am seeing what happens with two plants.
My plants, harvest in a week or so, are about 4 ft tall. I lollipop the lower growth. I would like to have another light in there and think it would be perfect. but I am yielding all I need, don't and won't sell a single gram, so I can't justify it at the moment.
Still, almost two years into growing, having a stable system, makes me want to be prouder of my grows. So i am hoping the next plant into the flower tent, mainlined to four tops, with all the space it needs, and no fight for light, will give me one to be proud of.
On my current grow, I had an extra clone. Rather than kill her, I threw her in the tent where she gets almost no direct light, in a one gal pot. there are are two others that get some light, one of which is actually under a cheapo 40w blue and red panel in a corner of my tent (not included in yield ratios). In any case, the one with no direct light has a little little less bud, but not as much as I expected. Will still prob pull about .75 oz off of her.
Not to say that all red and blue lights are the same. And my little one is crap. But there is no doubt that mine fucks up the leaves. The one under it always looks like shit at harvest.