The TSL2591 light sensor is an advanced digital light sensor, suitable for use in various lighting conditions. Compared to low-cost cadmium sulfide cells, this sensor offers higher accuracy, enabling precise lux calculations. It supports configurable gain and integration time settings, with a detection range from 0.000188 lux up to 88,000 lux. It features both infrared and full-spectrum photodiodes, allowing separate measurement of infrared, full-spectrum, and visible light. The TSL2591 provides an extremely high dynamic range of 600,000,000:1. Note that the I2C address is fixed at 0x29 and cannot be changed. The module includes an onboard voltage regulator and operates within a supply voltage range of 3.3V to 5.0V. It integrates a 16-bit ADC, enabling direct digital interface with microcontrollers—even those without analog inputs. Operating current is approximately 0.4 mA; power-down current is less than 5 µA, making it ideal for low-power applications. Interface type: I2C Operating voltage: 3.3V–5.0V Dynamic range: 600,000,000:1 Lux range: 0.000188 lux to 88,000 lux Operating temperature range: –30°C to +80°C Dimensions: 19 mm × 16 mm × 1 mm Pin definitions: VIN: Power input GND: Ground SCL: I2C clock line SDA: I2C data line INT: Interrupt output Material: Plastic Package contents: 1 × Digital Light Sensor Module