The LUX meters from Testo is designed to measure extensive range of applications, involving illumination equipment, lighting work and facility management. This instrument is capable of testing LED lighting and supports a wide range of luminance levels.
LUX is a measurement of the overall intensity if light, within an environment, for any given area or a distance from the source. The measurements by this instrument in an environment are the amount of light perceived by a normal human eye.
A lux meter uses a photocell to capture light. The meter then converts the light to an electrical current. Measuring the current would help calculate the LUX value of the light.