Lux (symbol: lx) is the unit of luminance and luminous emittance, measuring luminous flux per unit area. It is equal to one lumen per square meter. In photometry, this is used as a measure of the intensity, as perceived by the human eye, of light that hits a surface. Or more simply, a measurement of emitted light from a specific distance. This measurement takes into account more variables and is a more accurate method of measurement for certain circumstances.
WHAT IS AN LED?
An LED or Light Emitting Diode is a semiconductor diode that emits light when an electric current is applied in the forward direction of the device in the LED circuit. The effect is a form of electroluminescence where incoherent and narrow spectrum light is emitted from the P-N junction in a solid state material. The results - a highly efficient, very bright light source, while drawing less power.
WHAT IS A LUMEN?
Lumen (symbol: lm) is the unit of measurement used for the total amount of visible light emitted by a source. Or more simply, a measurement of emitted light from the direct source, the LED.
