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Energy-Saving Lighting Options. Lighting Facts. Accounts for 20% to 25% of all electricity used Average household spends 5% to 10% on lighting More energy used for lighting than to run a refrigerator Increasing lighting efficiency will decrease energy bills. Three Types of Lighting.

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Lighting Facts

  • Accounts for 20% to 25% of all electricity used
  • Average household spends 5% to 10% on lighting
  • More energy used for lighting than to run a refrigerator
  • Increasing lighting efficiency will decrease energy bills

Three Types of Lighting

  • Ambient Lighting
  • Task Lighting
  • Accent Lighting

Fluorescent Lighting

  • Used mainly for ambient & task lighting
  • 3 to 4 times as efficient as incandescents
  • Can last 10,000 hours
  • Quite different today than in the past
  • Provide a wider range of color quality

Fluorescent Lighting

  • Work well in new or existing fixtures – indoors or outdoors
  • Check CFL packaging for any restrictions in use
    • Some should not be used in enclosed fixtures
    • Many are made for specific fixtures

Light Output

  • Lumens measure light output
  • Watts measure energy
  • Example:
  • 100 watt incandescent = 1,710 lumens
  • 17 watts per lumen – 17 LPW
  • 29 watt CFL = 1,750 lumens
  • 63 watts per lumen – 63 LPW

Light Output

  • Quality of CFLs is a concern for consumers
  • Two factors affect light’s harshness
    • Color Rendering Index (CRI) – measures on a scale of 0 to 100 the perceived color of objects under artificial light
    • Color Correlated Temperature (CCT) – measures in Kelvin (K) the appearance of the light itself – how “warm” or “cool” it seems

Color Correlated Temperature Ranges

  • CFLs are available in a variety of CCT ranges
    • “Warm White” or “Soft White” 2700 K – 3000 K
    • “White”, “Bright White”, or “Medium White” 3500 K
    • “Cool White” 4100 K
    • Daylight 5000 K – 6500 K

Light Output & Cost Comparisons

  • Some LED lighting is a less ideal replacement for traditional lighting sources because of:
    • Low light output
    • Higher cost
    • Color differences

Light Output & Cost Comparisons

  • LED lighting is a good alternative for some lighting applications
    • Outdoor lighting – landscaping or holiday lights can benefit from LED durability
    • Longevity of LED lights is a benefit for lights that stay on for long periods or are installed in hard-to-reach places

Simple Ways to Conserve Energy Through Lighting

  • Use daylight for indoor lighting
  • Maintain lighting to enhance efficiency
  • Turn off lights
  • Clean or repaint small rooms
  • Select light-colored or translucent lampshades
  • Decorate with lighter colors

Simple Ways to Conserve Energy Through Lighting

  • Place lamps in corners to reflect light
  • Use dimmers, timers, & motion detectors
  • Replace halogen torchieres with Energy Star torchieres
  • Use solar lights powered by photovoltaics
  • Use task lighting
  • Buy dedicated CFL fixtures
  • Use low watt CFLs or an LED for nightlights

CFL Disposal – Closing the Loop

  • Mercury is an essential component of CFLs
  • No mercury released from CFLs when bulbs are intact or in use
  • EPA recommends taking advantage of local recycling options for CFLs
  • EPA is working with CFL manufacturers & major US retailers to expand disposal options

Change A Light, Change the World!

  • Replacing one incandescent with an Energy Star CFL can:
    • Save enough energy to light 7 million homes
    • Would result in a total savings of $600 million in utility bills
  • Replacing five most used light bulbs with Energy Star CFLs can:
    • Save you $60 per year in energy costs
    • Result in a total savings of $8 billion per year
    • Prevent greenhouse gases equivalent to emissions from nearly 10 million cars

Energy-Saving Lighting Options


Deborah J. Taylor

NC Cooperative Extension

Orange County Center


Web Resources

  • Consumer Guide to Home Energy Savings
  • Energy Star
  • Energy Hog
  • E-Conservation

This presentation was produced by North Carolina Cooperative Extension, Department of 4H Youth Development and Family and Consumer Sciences with funding from the State Energy Office, N.C. Department of Administration