Quote:
Originally Posted by Britton Flash
... I have been doing some research on lighting, and came across a conversion formula for lumens to footcandles at a given distance involving the lumens, distance, and angle. Does anyone have experience with this formula that can attest to its reliability for T5 and T8 lighting(tested it with a meter)? I am trying to be more precise with the distance I am putting between the source and plant.
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The best and most accurate thing to do is buy a light meter so you can make your own footcandle measurements. Here is the one I use, $35 from Amazon:
http://www.amazon.com/Mastech-Digita...ds=light+meter
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