TEMT6000 Ambient Light Sensor

http://www.dx.com/p/temt6000-ambient-light-sensor-purple-412649

https://www.sparkfun.com/datasheets/Sensors/Imaging/TEMT6000.pdf

https://www.sparkfun.com/products/8688

http://wiring.org.co/learning/basics/ambientlighttemt6000.html