Illuminance symbol " Eᵥ", base unit is lux , illuminance derived from luminousIntensity*solidAngle/length/length.
A lux (symbol: lx) is the SI derived unit of illuminance (Eᵥ).
One lux (lx) is equal to 0.0001 phot (ph).
One phot (ph) is equal to 6.451600000025807 lumen per square inch (lm/in²).
One lumen per square inch (lm/in²) is equal to 143.99999999554063 foot-candle (fc).