To be hoenst I dunno. I've had bad luck with those
I got a few frags and they turned ugly in my tanks. Never could figure out lots of light, little light, or even how aggressive they were.
I gave all mine away
I seemed to get contradicting info on those, everything from: "mine is 8 inches directly under a 250 watt metal halide bulb and is bright green," all the way to, "mine is under a rock under my sump under my rock cooking vats covered in a black garbage bag and is the brightest green you've ever seen..."
Ok, maybe I was stretching with the second one, but you get the idea