This module is a digital ambient light sensor, IIC I2C communication. Good for arduino light detection * Wide range and High resolution. ( 1 - 65535 lx ) * Power Supply 3V-5V * 16bit AD converter built-in * Low Current by power down function * 50Hz / 60Hz Light noise reject-function * Light source dependency is little. ( ex. Incandescent Lamp. Fluorescent Lamp. Halogen Lamp. White LED. Sun Light ) * Small measurement variation (+/- 20%)