It wins when it comes to heat. (From what I've been told/read). I agree that they're dated. I see so few write-ups on blurples and even digging into the archives I see very little to pick from. Judging from picture some of the older Blurples have large diodes that are a mix of red and blue. My light must have 50+ diodes including green and yellow spectrum. I also believe that chart I posted above, not that its complete, of course it isn't going mroe in-depth into the spectrum... but the idea it has that kind of power gives me faith and I'm seeing it in my grow. My plant isn't flowering the way I hoped but the buds are rock hard and frosty and smell like a motherfucker and I'm only 35 days in. They are certainly not CFLs.
I know cobb is probably a better option also, but remember my grow space. And I rent so I cant be hammering out holes in plaster to get rid of air.
I wanted the simplest, easiest, least hassle of producing as best quality bud that I could. Of course I'm paying for yield/quality on some level but so far its good enough, and not a hot heat mess or closet full of wires and ducting.
I will post a grow journal when I'm done..