Professional Light Meter - Wide measurement range: 1-400,000 Lux, Resolution: 0.1Lux/FC. Max display reading of 3999, Both weak and strong light can be detected accurately and quickly | 270º Rotated Sensor - The light sensor can rotate 270 degrees, which ensures precise light measurements from multiple angles and allowing the user to take measurements in the optimal position | Backlight Display - When the lighting conditions are not good, Backlight display can easy reading in dark environments. The digital illuminance meter has 2 units switching (lux & FC), Automatic shut-down (After 15 minutes of no operation), Temp (℃/℉), MAX/MIN | Data Logging - The light meter has a MEM button, short press to record data, each press records one instance of illuminance data. Long press to view the recorded illuminance data, with a total capacity of 30 sets of data that can be cyclically recorded | Wide Applications - This light Meter is equipped with high accuracy silicon photodiode components. GC-5000A lux meter can measure various visible light sources and is ideal for detecting illuminance in homes, schools, offices, factories, stages, farms