Lumenlux News Click here to see all the latest news and product information in the industry! What is ‘LumenLux?’ Quantity of Light on a Surface – Units of Luminance Footcandle (fc) = 1 Lumen ft² Footcandle (fc) = 10 Lux Lumen = Luminous flux or quantity of light Lux = 1 Lumen m² 1fc = 1lm/ft² = 10lux – lux = lm/m²