Light Illumination Enter value Select centimeter-candle flame foot-candle lumen/square centimeter lumen/square foot lumen/square meter lux meter-candle nox phot watt/square centimeter (at 555nm) centimeter-candle flame foot-candle lumen/square centimeter lumen/square foot lumen/square meter lux meter-candle nox phot watt/square centimeter(at 555nm) people found this article helpful. What about you?