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  1. light By Anish Persaud

  2. Humphry Davy Humphry Davy created the first electric light in 1800. Humphry took a piece of carbon and a battery and attached them with two wires. The carbon lit up creating light. This is called an electric ark. Humphry Davy made the 1st light bulb in 1809

  3. Humphry Davy

  4. The Incandescent lamp

  5. Incandescent lamp • Most inefficient type of light bulb • incandescent light is an electric light which creates light with a wire heated to a high temperature by an electric current until it glows.

  6. Limelight

  7. Limelight • A limelight was used to light up stages. • The limelight is also know as a calcium light. • A limelight is a made out of a blowtorch and a piece of lime. When the flame heats up the lime, it lights up.

  8. Energy Saving Light Bulb

  9. Energy saving light bulb • The energy saving light bulb need a lot less energy to operate than an incandescent light bulb. They save money and last longer (around 3/4 times). • The European Union has banned the manufacture and distribution of all incandescent light bulbs , meaning that the 60 watt clear bulbs will no longer be made.

  10. L.E.D lights

  11. L.E.D lights • LED stands for Light-Emitting Diode • L.E.D lights are very expensive. However they last forever and so are more efficient than any other lights. • LED lights are relatively new technology.

  12. THE FLORESCENTTUBE

  13. The Florescent Tube • We see florescent lighting virtually everywhere, offices, stores etc.. • It converts electrical power into useful light more efficiently than an incandescent lamp. • Standard fluorescent light bulbs created and used in the 1930’s

  14. Bibliography • http://wiki.answers.com/Q/Who_invented_the_light_bulb • http://en.wikipedia.org/wiki/Limelight • http://home.howstuffworks.com/fluorescent-lamp.htm • http://en.wikipedia.org/wiki/Fluorescent_lamp • http://www.youtube.com/watch?v=aPaeIFjpoQ8 • http://en.wikipedia.org/wiki/Incandescent_light_bulb • http://www.energysavingtrust.org.uk/Electricals/Lighting/Lighting-products/Energy-saving-light-bulbs-take-over#europe • http://www.which.co.uk/energy/energy-saving-products/guides/your-light-bulb-concerns-answered/

  15. Bibliography • http://www.cocoonyourhome.co.uk/section/content/?pageID=391 • http://answers.yahoo.com/question/index?qid=20120325155727AAS1l61 • http://wiki.answers.com/Q/What_does_LED_stand_for_as_in_LED_TV