The HTC LX-101A Digital Lux Meter is an advanced instrument designed for accurate light measurement. In other words, it is a device used to measure the amount of light prevailing in a specific area. Usually this is used as a measure of the intensity, as perceived by the human eye. Illuminance is a measure of how much luminous flux is spread over a given area or simply put, the amount of visible light present at a specific place. Previously analogue meters were used to measure amount of luminous flux. These meters used to work on the radiometric technology. One of the major disadvantage with these analogue meters was that the measurements were usually not accurate therefore the need of digital flux meters surfaced. HTCs LX-101A is a premium range of digital lux meters. Equipped with latest technology, these meters are capable of picking even the slightest emission of light flux from any surface.