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Reply to "Platinum Spot"

Eric is correct in that footcandle measurements use a single point since the light meters used to measure them are so small. For example, I have a flash light that puts out 17 FC but a few inches away from the center it drops to probably around 4 FC.

Basically, you are looking for Lux and not Lumen or footcandles. Lux takes into account area where as lumens and foocandles don't. For example, I can have 1,000 lumens focused onto one square meter and I get 1,000 lux. However, if I take that 1,000 lumens and spread it out over 10 square meters, I now have 100 lux.
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