In the user guide you can read information around light, sensor, and sensors. The user guide contains explanation related to light sensor, and module.
Many discussion like the light sensor, and touch sensor are presented in the user guide. These are taken from this user guide:
Loops Loop Loop starts at white arrow Loop ends at black arrow Loop goes through 3 times Can have loops within loops Loops while light sensor is less than value in red container Waits in between loops for a random number of seconds (maximum of 5 seconds) Sensors Wait for Touch Sensor Touch sensor on Port 2 Wait for 5 touches before continue Save a value in a container Saves the value of the light sensor Saves the value of the light sensor into the red container Waits until the light sensor sees a darker area Light sensor on port 2 Waits until the light sensor sees a 10% increase in input value Light sensor on port 1 Expected results: The example above is one possible way to solve the problem.
Additionally, this user guide presents discussion such as light source, and the light source.