Symbol lx. The SI unit of illuminance equal to the illumination produced by a luminous flux of 1 lumen distributed uniformly over an area of 1 square metre.
Chemistry
The SI unit of illuminance equal to the illumination produced by a luminous flux of 1 lumen distributed uniformly over an area of 1 square metre.
Chemical Engineering
An SI derived unit of illumination equal to a luminous flux of one lumen per square metre.