The Faithfull Digital Lux / Light Meter is ideal for use in electro-optical sources, research teaching, industry inspection as well as agricultural research and illumination control. It can be used to assess and monitor indoor area light levels, such as greenhouses, warehouses and office space. This device is able to measure light from many different types of bulbs, ensuring high levels of accuracy throughout. It includes a light meter and light sensor and will work with fluorescent, metal halide, high-pressure sodium and incandescent sources. Supplied with battery, user manual and storage case. Specification: Range: 1-50,000 Lux in 3 ranges 2,000/20,000/50,000 Lux Sampling Rate: approx. 2 times/second Sensor: Silicon photo-diode and filter Environment: Indoor operation Altitude: Up to 2000m Calibration: Standard incandescent lamp at 2854K Power: 1 x 9V PP3 battery (supplied) Dimensions: 192 x 67 x 44mm Weight: 198g