1.Uses a high-quality silicon photodiode sensor with a wide and stable spectral response from 320 to 730 nm, optimized for visible light measurement with a peak wavelength of 560 nm to ensure accurate illuminance detection. 2.Supports both Lux and Foot-Candle (Fc) measurement units, allowing users to easily switch between units to meet different lighting standards and application requirements. 3.Offers a wide measuring range from 0.1 to 100,000 lux and 0.01 to 10,000 Fc, with multiple selectable ranges for precise measurement across low to high light levels. 4.Equipped with a large LCD display featuring data hold and maximum value functions, enabling users to freeze readings or capture peak illumination values during testing. 5.Designed for convenient operation with dedicated range selection, Lux/Fc switching, and power controls, along with low battery indication for reliable use in professional and everyday light measurement tasks.