... big 6-digit LCD screen, measuring range of 0~90000 Lux & 0~8300.0 ftc, accuracy of ±(3% +30 digits), ... /ft^2) Range: 0~30000 Lux; 0~2788.0 ftcResolution: 1 Lux(0…30000 Lux);0.1 ftc(0…2788.0 ftc)Accuracy: ±(4% ... : about 20 minutes idle Operating environment: 0~+50°C(32~+122°F), 0~80%RH Storage environment: -20~+60° ... C(-4~+140°F), 0~80%RH Special function: Auto power off with ...