HT620 Portable Light Meter Digital Luxmeter Illuminometer Testing Instrument with High Accuracy Condition: Item Type: Light Meter Material: ABS Model: HT620 Range LX/FC 1000, 10000, 100000 Accuracy ±(3%+5Lx) calibrated at 2854°K according to ordinary incandescent lamp) ±(6%+5Lx) other visible light sources Cosine Angle Deviation Feature 30° ±2% 60° ±6% 80° ±25% Calibration Calibrated as standard incandescent lamp at a color temperature of 2854°K Resolution 1LX/1FC Sensor Silicon Photocell and Light Filter Use Environment Temperature: 0~40℃, Humidity: <80%RH, Altitude: <2000m Storage Environment -10~50℃, Humidity <80%RH Sampling Rate About 2 Times per Second Spectrum Range 320-730nm Automatic Power Off 10 Minutes Power Supply 3 x 1.5V AAA (LR03) Battery (Not Included) Product Size Approx. 185 x 60 x 30 mm / 7.3 x 2.4 x 1.2 in Weight Approx. 274g / 9.7oz