wassup regularguy
yep, it looks like you could actually do that. but you can't.
as you get closer and closer to the lamp, the denominator gets smaller and smaller, and the ft-candles WILL get bigger and bigger. but, what you're really doing there is concentrating the light onto a smaller and smaller area. the numbers go up because the area gets so small (same principle as a magnifying glass). so the illumated area at 1 inch distance is only 12.6 square inches - less than a tenth of a square foot!
and that's assuming you can somehow get
all the light from the bulb!
so, how many envirolites would it take to illuminate my 5 ft. by 5 ft. grow area (assuming perfect efficiency) to about the same brightness as outdoors (10k lu/ft. sq.)?
i'm thinking i'll stick with the hps
