Hey Mark,
First impressions is that it's got good build quality. It doesn't have heatsinks but seem to stay very cool. The fans are loud, but thank goodness I pretty much have a sealed canopy. Once you open the canopy that's all you hear are the fans. My tank temp has remained so consistent without the degree or two temp creep throughout the day.
It's been 5 weeks and several people have noted that there has been no change in my coral colours. Polyp extension and growth seem to be normal for my system. I have kept the same hours of lighting as my halides to keep it fair.
One thing I do miss is the "large" shimmer. These leds produce several "mini" shimmering effects in the water.
Like I said, I'll give it 6 months before selling my halides.
Only time will tell I guess. Hope this helps.
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