They look very appealing and the price is right. Looking for feedback from anyone that has them on their reef tank!
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They seem sweet, right!?!?Bump
In most common situations, one of two methods is used to define the beam angle; the first looks for the angle at which 50% of the peak intensity is reached on either side of the origin. The second looks for the angle at which 10% of the peak intensity is reached on each side of the origin. Most commonly used is the Full Width, Half Maximum (FWHM) relating to 50% intensity, if for example an LED was measured to have 50% intensity at 15° it’s viewing angle (FWHM) would be 30°.