1.Uses a photovoltaic cell sensing principle to convert incident light into electrical signals, with the measured current proportional to illuminance and displayed directly in lux (Lx). 2.Supports multiple measurement ranges through gear switching, allowing accurate testing of both low and high illuminance levels in different environments. 3.Simple operation process including power on, range selection, real-time display, and HOLD function to lock stable readings for easy observation and recording. 4.Widely used for evaluating lighting conditions in workplaces, public spaces, laboratories, schools, stadiums, and indoor environments to help meet illumination standards. 5.Helps assess lighting adequacy to improve safety, reduce visual fatigue, and support eye health by providing reliable and accurate illuminance measurements.