The TA636 Series Digital Illuminance Meter is a professional handheld light measurement instrument designed for accurate visible light intensity testing. Also known as a Lux Meter, Illuminance Tester, Light Meter, or Light Intensity Meter, it adopts a high-sensitivity silicon photodiode sensor with an optical filter system to provide reliable measurement across the 400–700nm visible light spectrum, matching human eye response characteristics. The TA636 Series includes the basic TA636A model and the Bluetooth-enabled TA636B model. The TA636B supports wireless connection with a mobile APP, allowing users to remotely view, record, and manage measurement data. With LUX and FC unit switching, automatic range selection, data hold, maximum/minimum value recording, and backlight display functions, the meter provides efficient solutions for professional lighting inspection and environmental evaluation. Featuring accurate measurement performance, compact design, and easy operation, the TA636 Series Digital Illuminance Meter is widely used in industrial manufacturing, electronic assembly, precision workshops, warehouses, logistics centers, hospitals, healthcare facilities, schools, laboratories, offices, shopping malls, hotels, exhibition halls, photography studios, architectural lighting projects, and residential lighting applications. It is an ideal tool for lighting acceptance testing, workplace illumination assessment, safety management, and indoor light environment analysis.