Hey look here, there is a nice foot candle / lux chart worth reading and mabe even adding to your graph. It would be neat to have a grand unified lighting chart!
http://www.fredparker.com/ultexp1.ht...ensity%20Chart
Ok here is what I have done.
I calibrated my meter to sunny 16 rules and my meter is dead on.
Thease are the readings for the 1000 watter.
48" = F 8.5 about 3250 lumens (I think?)
36" = F11.5 witch is half stop under sunny 16 witch gives us about 7500 lumens to the leaf of the plant.
32" = F 11.9
28" = F 16.1 (Same as noon day sun)
24" = F16.6
20" = F22.0 (Double noon day sun or 20,000 lumens)
16" = F22.5
12" = F 32.2 (Four times noon day sun or 40,000 lumens.
What this data tells me is that with the 1000 watt light, there is a narrow range where the lumens are ideal. About 36 inches to about 26 inches from light is where we want the plant to be. Can you say Side lighting! The flourex lights seem perfect for side lighting applications. My bulb is only a week old and is a 110,000 lumen Agrosun. My reflector is a hydrofarm. I bought it because it was the smallest reflector I have seen that could fit a 1000 watt bulb. Since I bought it I have heard that it is a very good reflector.
This means that this light can only cover a 9sq ft garden at optimum lumens. If the garden were taken out to 16 sq feet, the plants at the edge at 48 inches are only getting light levels about 1/3rd the levels as the noon day sun and the center of the garden ends up suffering as well. I do think however a 14sq/ft garden under a 1K light is a very nice garden but 9 sq/ft would be better!