Hello Carblevel, to be honest with you I don't know except my led ain't putting out but about 145watts at the wall, even though that's all I used on my last grow along with a few cfls and it did a damn good job then, dense, hard ,sticky bud.
I ain't been running the 315 but a week or so and I can really tell you that it's doing an awesome job and mine is a cheap one at that, didn't cost even 200 bucks, hardly no heat , Sammy uses 315s and he grows some great looking plants . Anyway got a good buzz going now an ain't nobody around the house to talk too ,so excuse my ramblings carblevel.