The TSL2591 light sensor is an advanced digital light sensor, suitable for use in light conditions. Compared to low-cost cadmium sulfide cells, this sensor is more accurate, allowing precise calculations and configurable for different gain/timing ranges, with a 188 light detection range up to 88,000 at a flying distance. It contains both infrared and full-spectrum diodes, which can measure infrared, full-spectrum or human visible light respectively. The TSL2591 light sensor has a huge dynamic range of 600 million:1. Please note that compared to the previous TSL256 1, the 7-bit I2C address (0x29) of the sensor cannot be changed. The board has a voltage regulator and can work at a voltage of 3.3V-5.0V. The built-in ADC device can take advantage of this with any microcontroller, even if it does not have an analog input. Actively sense 0.4mA, less than 5A in power-down mode. The device current consumption is extremely low, so it is very suitable for low-power data recording systems. Interface type: IIC Voltage range: 3.3V-5V Dynamic range count: 1 600,000,000 range: 188 uLux sensitivity, up to 88,000 lumens input measurement. Temperature range: -30Celsius~80Celsius Dimensions: 1 9mmx16mmx1mm Pin Definition: VIN: Power + GND: ground SCL: I2C serial clock line SDA: I2C serial data line : interrupt pin Colour:As shown Material:plastic Package Contents: 2 set x Digital Light Sensor Module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.