So far so good, though as you know I don't really have much livestock to track growth yet. Their website is not as savvy as that of other lights like aqualumination, but apparently they are being used by commercial coral farms to grow. From my research, they offer very high par value per watt, one of the highest in the mkt and they claim to have the right spectrum for good colours and growth and their led bulbs are "specially made" for that purpose.. Not sure how true, could be all made in China in reality, haha. Will update over time