excellent bulb so far. 3 weeks By mos90 on 8/23/13
mos90 would recommend this product to a friend
i added this bulb to replace my 400w radiums. though i do like the radiums i wanted the outsides of my tank a little brighter and a little more white. so far the corals have responded well to the change. its too early to notice any growth changes.
i still kept 1 radium in the middle of three bulbs. they make great combo like.