The sensor module uses the BH1750FVI. This is a digital Ambient Light Sensor IC for I2C bus interface. This IC is the most suitable to receive the ambient light data for adjusting LCD and Keypad backlight power of the Mobile phone. It is possible to detect a wide range at High resolution.(1 – 65535 lx)

Specifications

• High precision determination accurate to 1 Lu for different lights.
• Dichroism close to visual sensitivity.
• Direct digital output.
• Sensor build-in 16-bit AD converter.
• Power Supply: 3~5V.
• Date Range: 0~65535.
• Size: 13.9mm x 18.5mm.

​For BH1750FVI digital Light Intensity sensor chip datasheet, Click here

For Arduino  example, Click here