TSL2561 Light Intensity Module Sensor Module Super Intensity Module GY-2561

TSL2561 is a light-to-digital converter, which converts light intensity into digital signal output, with direct I2C connection or SMBus interface. Each device is connected to a bandwidth photodiode and an infrared-responsive photodiode on a separate CMOS integrated circuit. This integrated circuit has the ability to provide a near-optical response with a 20bit dynamic range. Two integrated ADCs convert the photosensitive current into a digital output, which measures the luminescence of each channel. This digital output can be the input of a microprocessor.
 
The TSL2561 Luminosity Sensor Breakout is a sophisticated light sensor which has a flat response across most of the visible spectrum.
Unlike simpler sensors, the TSL2561 measures both infrared and visible light to better approximate the response of the human eye. And because the TSL2561 is an integrating sensor (it soaks up light for a predetermined amount of time), it is capable of measuring both small and large amounts of light by changing the integration time.
The TSL2561 is capable of direct I2C communication and is able to conduct specific light ranges from 0.1 - 40k+ Lux easily.
Additionally,
the TSL12561 contains two integrating analog-to-digital converters (ADC) that integrate currents from two photodiodes, simultaneously.
breakout requires a supply voltage of 3V and a low supply current max of 0.6mA.