Professional LED Light MeterAP-881D has a wide measuring range from 0.1 to 400,000 Lux / 1 to 40,000FC. Whether you are a photographer, designer or plant lover, AOPUTTRIVER photometer will meet all your requirements. Upgrade Accuracy4%rdg0.5%fs (minus 10,000 Lux; 1,000 FC) / 5% rdg 10 dgt (over 10,000 Lux; 1,000 FC); Resolution: 0.1Lux/0.01Fc; 0.1 - 400,000Lux / 1 - 40,000FC; Measurement speed: 2 times/second. 270 Degree Rotating DetectorKeep an eye on the light level anywhere in the room; the light meter sensor can rotate 270 degrees, so you don't need to move the light meter, just rotate the degrees to measure the light you need. Multi-function and easy To UseQuick response, auto-zero, data hold and peak data hold switches, low power consumption, MAX/MIN hold, relative value, / switch, with LCD backlight.