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Understanding Lighting Efficiency: From Bulb Choices to Luminosity

Explore the concept of lighting efficiency, focusing on the amount of visible light produced for a given energy input. Historically, consumers chose lightbulbs based on energy consumption, but today they can make more informed decisions based on light output and energy use. Learn about various lighting options—including incandescent, fluorescent, LED, and halogen lamps—and understand the sources of inefficiencies like heat generation and non-visible radiation. Enhance your knowledge to make better lighting choices for your home or business.

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Understanding Lighting Efficiency: From Bulb Choices to Luminosity

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  1. LIGHTING EFFICIENCY Neil Hope Taylor McKenzie

  2. LIGHTING EFFICIENCY the amount of visible light produced for a given energy input

  3. Historically, lightbulbs were purchased based on energy consumption • Today, more informed decisions may be made based on a bulb’s light output and energy consumption • However, not all lightbulbs’ light output is the same

  4. Luminosity Function • Response of the Human Eye to light

  5. Sources of Inefficiencies • Heat generation • Generation of radiation outside the visible spectrum

  6. Lighting Options • Incandescent lamps • Fluorescent Lamps • LED (lamps) • Electron Stimulated Luminescence • Halogen Lamps • Sodium Lamps

  7. Electron Stimulated Luminescence

  8. Sodium

  9. Household Lighting

  10. Lighting Efficacy

  11. Thank You • Any Questions? • eg When does the break start? • Sooner if you don’t ask questions

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