LED Lights

History of LED Lights: http://www.extremetacticaldynamics.com/history-led-lighting.php

This sight gives a lot of information about how it works and who helped develope it. It also gives a timeline of its operation: http://www.edisontechcenter.org/LED.html

This is a little information on their uses and also their cost efficiency: http://www.ehow.com/about_5475153_led-lights-used.html

Talks about Halogen Light Bulbs : http://www.bulbs.com/learning/halogen.aspx

This talks about many different types of lightbulbs dating back to the 19th century. I wanted to include this because it named a bunch of inventors who contributed to the evolution of the light bulb: http://inventors.about.com/od/lstartinventions/a/lighting_2.htm

Talks more about the history of the halogen: http://www.parkaveent.com/Halogen-History.html