No but I have the 550 as well, I've seena dutch grower on youtube with 4x these on 9 clones which ended up nice little fat colas, nothing to huge. Good additional spectrum additions lights I suppose. Any pics of the 550's in action??Hey guys I just ordered a couple of these and was wondering if anyone has tried them. I'm currently using 2 ProGrow 550's on a light mover and wanted to add a couple of these to the room. Has anyone added these to an all LED grow?