• Question: what is the life span ofa filament in a average light bulb ?

    Asked by Fuzzy Chicken to Hephzi, Imogen, Jen, Jennifer, Tom on 11 Mar 2015.
    • Photo: Thomas Barrett

      Thomas Barrett answered on 11 Mar 2015:

      Ooo interesting question. Well it depends on the power of the bulb and the amount you use it.

      Incandescent bulbs typically have short lifetimes compared with other types of lighting; around 1,000 hours for home light bulbs versus typically 10,000 hours for compact fluorescents and 30,000 hours for lighting LEDs.

      There is a place in the USA that claims to have had the same lightbulb in and switched on for 113 years however!

      If you want to be green and energy efficient switch to LEDs.

    • Photo: Jen Machin

      Jen Machin answered on 11 Mar 2015:

      Tom has answered this really well, so I’m not sure there’s much more I can add, except that the longest burning light bulb even has its own website! Here it is:

      http://www.centennialbulb.org/

      They actually held a birthday party for the light bulb on its 110th birthday! 😀

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