Enter Total PPF output of Lamp in µmol or PPF. To calcualte this simply multiply the efficiency of the LED lamp with its power. A 2.5 PPF/W or 2.5µmol/j lamp with 480 watts will have 1200 µmol or PPF output.
Enter Length and Width in feet. These are the dimensions of your target area.
Percentage of light that reaches Target (Min 0 to Max 100) : Not all light reaches the target area. Some light is lost to spillage in isles. Walls are also not 100% reflective and diffuse light.