DSunY® Programmable Aquarium Coral Reef LED Glow Light(Moon/Noon/Spring/Autumn/Summer/Winter/Lu

This is a fantastic LED system. You can program everything right down to a % of blues and whites and you can even set it on a curve that mimics the sun's zenith and the moon's lunar movement. Do yourself a favor though. If you are ordering this for a 90 gallon or larger get the quad system. This will not cover the whole tank well enough on a tank that large.

I did a lot of research before I bought these lights because like most people I was looking for the most bang for my buck. I hoped to purchase them after reading reviews; however, I took a chance and bought it without any to read. It shipped from Hong Kong (I think from the factory) and took about 8 days. So far I am very happy with the system. The manual actually states that the blue lights have a dominant wavelength of 470nm and the white lights are 12,000K. My tank is a new start-up so I have been using the manual mode to limit the amount of time the lights run because of algae/diatom growth. My only complaint is that in the manual mode it defaults to the lunar mode being on. I'm not sure why. Otherwise I am very happy. I won't get corals until after my tank cycles, so I can't speak to coral growth, but my anemone seems to like them (I hope it survives the cycling). You can tell that the manual was written by someone who isn't American, but it makes sense. I like the charts in the manual that show what the light intensity of both blue and white lights are during a 24 hour period in each mode (Spring/Summer/Autumn/Winter/Lunar). It comes with the "premium" controller box that is fairly easy to use plus it doesn't lose its' memory if you unplug it. I'm not sure how long it will keep the memory of your settings if unplugged. It comes with two brackets that allow you to connect the two light fixtures together end-to-end. The brackets give you the ability to separate the light fixtures by about 1/4" up to 6" or so. I chose to use the brackets because I couldn't get the lights to stay aligned without them. The hangers are a little cheesy, but they work fine. My only wish would be for the lights to have a bracket to sit on the tank, but that's a personal preference. The LED's are made by Bridgelux who is an American company. They aren't top-of-the-line like CREE, but they appear to be above average. Somewhere I read that the lights operate at 90% after 40,000 hours with a life of 50,000 hours. Lastly, there aren't any fans to make noise, so that is a plus. I hope this helps those who are undecided. At this point I would purchase them again.

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