Tag Archives: LED unit

LED brightness unit Luminous intensity: The measurement units of luminous intensity include illuminance unit (lux), luminous flux unit (lumen Lumen), luminous intensity unit (candle power). 1CD (candle power) refers to a completely radiated object;
Luminous intensity per sixtieth square centimeter area at the freezing point of platinum. (It used to refer to a whale oil candle with a diameter of 2.2 cm and a mass of 75.5 grams, burning 7.78 grams per hour, a flame height of 4.5 cm, and the luminous intensity along the horizontal direction) 1L (lumen) refers to 1 CD candlelight irradiated at a distance of 1 cm , the luminous flux on a plane with an area of 1 cm2.