LilyPad Light Sensor Hookup Guide
Contributors:
Gella
Gella 
Resources and Going Further
Here are some resources for planning a project with the light sensor:
Or, you can check out these other great light-based tutorials.
IR Communication
This tutorial explains how common infrared (IR) communication works, as well as shows you how to set up a simple IR transmitter and receiver with an Arduino.
RGB Panel Hookup Guide
Make bright, colorful displays using the 32x16, 32x32, and 32x64 RGB LED matrix panels. This hookup guide shows how to hook up these panels and control them with an Arduino.
GPS Differential Vector Pointer
Use GPS to have two objects, a base and a target, point towards one another. This can be used to aim a directional antenna (or in the case of this project, a laser) from one object to the other object at a distance that is only limited by your ability to provide the base station with the target's GPS location.
DIY Light-Up Shoes
This tutorial provides everything you need to know to make your own light up high top sneakers!