Can someone please tell me how LED beam angle affects plant growth? I am looking at purchasing a light from buildmyled.com and this is one of the options that I have.
Basically the wider the angle the more the light is spread. The more it is spread the lower the PAR value will be at the bottom of the tank. I believe it is Hoppy that has the equation in one of his posts if you want to input your dimensions to see what angle is best....my guess is 75°
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