Gospel Dawg
Active Member
I have 2 MARS 2 900w LEDS set for flowering. How close should they be to the tops of my babies?
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That is correct. If you look at the dispersion pattern of most LEDs it's called the Lambertain pattern. That means the distribution is more of a bell curve than a spreading. 70-80% of all the light will be projected in the first 30 degrees of the half angle or in a 60 degree pattern. The other 60 degrees you receive a much lower photon density. This varies greatly from one diode type and manufacturer to another, but the concept is the same across all of them.