This RobotGeek Light Sensor is an analog sensor that will allow you to measure light from your Arduino or other microcontroller. The more light the sensor detects, the higher the your analog port will detect.
Each RobotGeek Light Sensor comes with a dual female-female jumper cable so that you can move the light sensor off the board. This makes placing your sensors easier than ever.
You can use this sensor to measure the ambient light in a room, or to measure the relative brightness of different sensors. You can even add a laser pointer and make a basic laser-trip wire system! These sensors are also great for basic light-following robots.