Features: Adopting a detector powered by a silicone photocell with high stability, photostability, and shock resistance, strict vision correction and accurate photometric measurement can be realized. With a wide measuring range, it can measure between 0.01-39990cd/m2 without a dimmer. It is a digital display with good indication reproducibility, data latching and peak value latching functions; With very low power consumption, it can operate continuously for 100 hours on a 9V layer-built battery; Mini light probe, measuring angle