Light meter with double molded housing and large backlit display with 40-segment bar graph The HD400-NIST Light Meter measures from 0 to 40,000Fc and 0 to 400kLux in with 0.01Fc/0.1Lux resolution. It features: 5% accuracy, Peak mode (10µs), Relative mode, Min/Max, Data Hold, backlit LCD display with 40-segment bar graph, and a rugged double molded housing. Comes complete with light sensor with 3ft (1m) cable and protective cover, software with USB cable, hard carrying case, and 9-Volt battery.With NIST Calibration.