It is interesting that Growers Choice is already advertising a new light. The ROI-680's did not work out for me. I saw a lumitek product the other day at the shop and it is the same light as the Growers Choice ROI-680. Also I would be more interested in comparing the 720 to the Fluence Syder 2I. The Fluence gear is great stuff in my opinion. In my experience with LED grow lights, there is a direct association with Cal Mag needs and spectrum. More Cal Mag means the light is pushing out more far reds and UV. I seriously question any company having a better understanding of the plants light needs than Gavita and Fluence. I say gavita because of their influence with the DE market and Fluence for their designs and well they are owned by Osram and have been for some time. With Osram owning them it pretty much makes them the leader of the pack in my opinion.