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Phot to foot-candle

Values for calculation

$ \text{Value} $

Illumination converter

Illumination converter from phot to foot-candle

$$ 1\ \mathrm{ph}={\cfrac{1}{10^{-4}}}\cdot{\left(0.9144/3\right)^2}\ \mathrm{ft\cdot\ c}=929\ \mathrm{ft\cdot\ c} $$