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.
Using OpenSegment
How to hook up and use the OpenSegment display shield. The OpenSegment is the big brother to the Serial 7-Segment Display. They run on the same firmware, however the OpenSegment is about twice as big.
LED Light Bar Hookup
A quick overview of SparkFun's LED light bars, and some examples to show how to hook them up.
Hackers in Residence: The Sound Visualizer
A fun project that uses a Raspberry Pi and a custom Java app to create your own sound visualizer using a RGB LED matrix.
SparkFun gator:particle Hookup Guide
The gator:particle is an I2C heart-rate monitor and pulse oximeter that can be used as a particle sensor. This tutorial will get you started using the gator:particle with the micro:bit platform.