It's an $800+ light meter. You shouldn't have to do any $#!+ remotely like that to find an exposure or a luminance range.
Foot candles are no better or worse for figuring out luminance range than are f stops. Both are symbolic/arbitrary when used for this purpose anyhow. You don't need to know how much light there is when measuring a luminance range. You just need to know how far apart lights are from each other. One full step on a meter with either an f number scale or a foot candle scale means the same thing: either a doubling or a halving of light intensity read by the meter. You don't even need numbers. All you need are hash marks showing the full steps.
What does make visualizing luminance range much, much easier is having an analog scale with a full ring-around of equivalent exposures. If this is how you plan on using your light meter, sell the $800+ one while it still has value, get a Studio Deluxe used for under $100, and enjoy $700 worth of hamburgers or something.
Well, if you are truly interested in measuring luminance then there are luminance meter like that of Konica Minolta (KM still makes and sell them unlike the exposure meters) LS100 or LS110 for only around $3,500 each. Your choice.
What I meant is that to accurately measure luminance requires a much more expensive meter than an exposure meter.