Long range, test range of up to 200000 lux, easy to test all natural light andartificial light. Lux meter own temperature sensor can accurately test the temperatureof the current environment in real time. One-key conversion between LUX and FC. Lux is the luminous flux passingon the square meter area;FC is the luminous flux passing on the square foot. 9v large capacity battery, convenient operation, and electric power. This instrument adopts the split type probe, can in a variety of environmental test.