fuck yes I am happy with them. they are hard to learn at first, they are SUPER POTENT and you have to keep them higher than you would think and feed a bit heavier than you would think as well. once I raised my lights and dialed them in they would slay it in veg......and in flower for that matter, I have one veg rig built and 5 or six BIG flowering arrays that will do a 4x4 with ease at 600w. if I crank them to 880 you gotta put your fucking welding goggles on
that doesn't mean I'm not interested in CMH or QMH or quantum boards/photon fantom boards. they say the benefit of the 315s is multiple light points, more uniformity etc. with the COBs I'm pushing ~40w per sqft in flower, one cob per sqft over the entire grow.
I'm thinking 315s for my veg area, and COBs/DE for my flower. I really wanna do CMH because I like the CRI values and ease of working around. its hard to read the plants in that orange fucking hps light.