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 integrated 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. Each breakout requires a supply voltage of 3V and a low supply current max of 0.6mA. Features Selectable detection modes high resolution 16-Bit digital output at 400 kHz I2C Fast-Mode Wide dynamic range: 0.1 - 40,000 LUX Wide operating temperature range: -40°C to 85°C Programmable interrupt function with User-Defined Upper and lower threshold settings Application Ideas Ambient light sensing Backlighting control for display panel Keyboard illumination control