lux
Definitions
General Science
- noun an SI unit of brightness of light shining on a surface.
Construction
- A measure of illumination striking a surface. One lux is equal to one lumen per square meter.
Electronics
- The SI unit of illuminance. It is also a unit of illumination. It is equal to the illumination of 1 lumen per square meter, which is also equal to approximately 0.0929 foot-candles, or 0.0001 phot. Its symbol is lx.