The BH1750FVI Digital Light Intensity Sensor Module (GY-30) is a compact and highly accurate ambient light measurement module designed for smart lighting, IoT automation, weather monitoring, and energy-efficient control systems. Unlike conventional LDR-based circuits that require external components and analog signal calculations, the BH1750FVI provides direct digital lux measurements through its integrated 16-bit ADC and I2C communication interface. With a measurement range of approximately 1 to 65,535 lux, it can detect subtle changes in surrounding illumination with excellent resolution. Its low-power operation, simple two-wire communication, selectable measurement modes, and compact design make it easy to integrate with Arduino, ESP32, Raspberry Pi, and other microcontroller platforms. Its key novelty lies in combining high-resolution digital illuminance sensing with direct lux output, eliminating the need for external signal-conditioning circuits and complex calibration, making it particularly suitable for adaptive street lighting, automatic display brightness control, smart agriculture, solar monitoring, and intelligent home automation applications. Featured by FamePhase Electronic Accessories .