uhavealighter?
Active Member
Found this cool light distance chart from www.vertigrowsystems.com. Thought people would find it useful. its measured in foot-candles which is the same thing as lumens per square foot. It proves that the equation posted everywhere isn't correct at all. its not (distance from bulb)^2. Its (surface area the light covers at a certain intensity)^2. There can't be a simple equation for this. It depends on the light and the reflector used.
