1. A Light-Emitting Diode (LED) in essence is a P-N junction solid-state semiconductor diode that emits light when a current is applied though the device. 1. Joel Middleton 2. Luis Nunez 3. David Quinn 4. Zack Yost

2. They can be used as flashlights They can be used in lamps Basically any thing that lights up your house They last about 50,000 hours longer than a regular light bulb Some cop lights use LEDs Also found in TVs, radios, telephones, calculators, and even watches

3. LEDs are about 90% more energy-efficient than the standard incandescent bulb, and about twice as efficient as Compact Fluorescent Light Bulbs. LEDs present many advantages over traditional light sources including lower energy consumption, longer lifetime, improved robustness, smaller size and faster switching.

5. The LED was first invented in the early 20th century, and introduced as a practical electronic component in 1962. They are relatively expensive and require more precise current and heat management than traditional light sources Applications of LEDs are diverse.

6. http://www.bbc.co.uk/bloom/actions/light emittingdiodes.shtml http://www.bbc.co.uk/bloom/actions/light emittingdiodes.shtml http://www.articlesbase.com/gadgets-and- gizmos-articles/every-home-needs-an-led- flashlight-476746.html http://www.articlesbase.com/gadgets-and- gizmos-articles/every-home-needs-an-led- flashlight-476746.html http://www.copperwiki.org/index.php/Ligh t-emitting_diode_lights