1.Precision solar power meter designed for measuring light intensity in solar radiation testing, solar research, optical experiments, meteorology, and agricultural applications. 2.Supports measurement of glass light intensity, suitable for evaluating light transmission through vehicle windows and other glass materials. 3.Selectable measurement units between W/m² and Btu/(ft²·h) with a clear 4-1/2 digit LCD display showing values up to 19999. 4.Features data hold function, direct measurement without adjustment, fast 0.25s sampling rate, and stable long-term measurement performance. 5.Compact and lightweight handheld design with CE certification, powered by a 9V battery, for portable field and laboratory light intensity testing.