lux meter, also known as foot-candle meter is used for measuring brightness. It basically comes in use when we need to find the intensity with which light appears on the human eye. The light or energy produced and reflected from the object is different from the intensity we are talking about. This meter uses a photo cell which captures light.
The photo cell then converts the light into electric current. This current then allows the device to measure the lux value of the light that was captured. Lux meters are used in photography, videography, and health and safety regulatory actions.