An illuminometer (or lux meter) is an instrument that measures luminosity and brightness. It consists of a host and a light sensor. The measurement range is 0-50000. The average indoor illuminance is from 100-1000lux, and the outdoor solar illuminance is about 50000lux. lux is a unit of illuminance that expresses the density of light shining on a surface. Its applications are mainly indoors, offices, laboratories, and environmental research.
