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How can You Demonstrate the Efficiency of Different Light Bulbs?


Source Institutions

    Colorado State University

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How can You Demonstrate the Efficiency of Different Light Bulbs?

In this activity, learners actually feel the difference in energy required to light two different types of light bulbs: incandescent light and LEDs. Learners will use a generator (hand crank) to provide the power and observe that the bulbs are equally bright. They will be surprised to learn that incandescent bulbs require more energy. This is a hands-on activity that works best if learners experience cranking the generator themselves, and works well at a learning station or center. This activity can be incorporated into a lesson on energy efficiency and/or used during winter holidays since it uses holiday lights.

Quick Guide


Preparation Time:
Under 5 minutes

Learning Time:
5 to 10 minutes

Estimated Materials Cost:
$5 - $10 per group of students

Age Range:
Ages 8 - 14

Resource Types:
Activity, Lesson/Lesson Plan

Language:
English

Materials List (per group of students)


  • 1 hand generator
  • 2 alligator clip leads, 1 black and 1 red
  • 1 cluster of 6 white LED Christmas tree lights
  • 1 cluster of 6 clear incandescent Christmas tree lights
  • Infrared goggles (optional)

Subjects


  • Engineering and Technology
    • Technology
      • Energy and Power
  • Physical Sciences
    • Electricity and Magnetism
    • Energy
      • Energy and Power
    • Light and Optics
      • Electromagnetic Spectrum
  • The Nature of Science
    • The Scientific Process
      • Conducting Investigations
      • Formulating Explanations
  • The Nature of Technology
    • Technology and Society

Audience


To use this activity, learners need to:

  • see
  • touch

Learning styles supported:

  • Involves hands-on or lab activities

Other


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Access Rights:

  • Free access

By:

Rights:

  • All Rights Reserved, Little Shop of Physics, ©2009

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