Quote Originally Posted by bigsby
Note 23w vs. 3w. I bet that little one would look awesome with 23w of LED! Also note that light diminishes exponentially the further it travels. Why? Because light does not travel linearly but in all directions at once. So double the distance of light to the plants is not 2x less light but the distance raised to the third... I think that is the equation...
That is only true with a point or 360 degree light source not all light sources.