I believe the rule of thumb is about 1 LED per 12 square inches. So if the tank is 60" long and 18" wide you'd need at least 90 LEDs. With SPS you always want to go over the recommended base line so personally I would be aiming for between 120 to 144 LEDs. I wouldn't use 40 degree optics as they don't actually spread the light evenly over a 40 degree spread, they will concentrate most of the light at around 20 degrees which can create hot spots which although not noticeable to our eyes I don't think it's ideal for coral. 60 degree optics would be better IMO but I'm no expert.
The all in one kits are really easy to build, anyone who has used a soldering iron before can easily do it.
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12-10-2010, 03:26 PM
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