In personal experience, I recommend the Radion from ecotech. I work at my lfs and we used to run hydra's on our 30 gallon reef tanks. The lights themselves worked fine, but within a year had hardware issues. Different fixtures had different issues from everything from the modules to the leds. The radions we ran never had these issues. There are issues with the Radions every once in a while but mostly minor things that can be fixed over phone tech support. We ran probably half a dozen or so Hydra's and now we run strait Radions for the store. I also run Radions for personal tanks.