Work Cited

History info

http://invsee.asu.edu/modules/lightbulb/meathist.htm. 

 http://www.bulbs.com/learning/history.aspx.

The pictures

 http://www.wired.com/thisdayintech/2009/12/1218joseph-swan-electric-bulb/ 

 http://home.frognet.net/~ejcov/index40.html

Incandescent Bulb info

Giancoli. Physics. Sixth edition.Pearson Prentice Hall. Upper Saddle River, New Jersey. 2005. page 495.

http://home.howstuffworks.com/light-bulb1.htm

http://tpt.aapt.org/resource/1/phteah/v37/i9/p520_s1

http://donklipstein.com/bulb1.html#vvg

The pictures

http://home.howstuffworks.com/light-bulb1.htm

http://pastormikelandry.wordpress.com/2010/03/18/burnt-out-light-bulbs/

http://www.sciencephoto.com/media/343488/enlarge

LED Bulb info

http://science.howstuffworks.com/environmental/green-tech/sustainable/led-light-bulb1.htm

http://en.wikipedia.org/wiki/LED_circuit

Macaulay, David. The New Way Things Work.Houghton  Mifflin Company. Boston. 1998. Page 273.

LED photos

http://www.eyewriter.org/images/data/EW-2_0-manual_grafx/

Facts info

http://www.cheaplightbulbsinc.com/guide/p7-fun-facts-about-light-bulbs.html

http://www.oldchristmastreelights.com/interesting_facts.htm

Facts Photos

http://tanningbeds.mercola.com/

http://www.amazon.com/Mood-Lights-Colorful-Light-Bulbs/dp/B006GWI292

http://www.windowsbygeorge.com/christmas-light-installation-mckinny-frisco-plano-tx.html

© Robin Palmer 2012