An Outdoor Lighting Revolution The Transition to SolidState LED Lighting

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An Outdoor Lighting Revolution The
Transition to Solid-State LED Lighting

• Terry McGowan
• International Dark-Sky Association
• lighting_at_ieee.org

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The First Electric Outdoor Lighting
NYC 1879 - 1881
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Menlo Park, NJ December 31,
1879
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Incandescent Radial Wave Luminaire 1940s
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Standard
Full Cutoff
Cobra Head Street Lighting Luminaires
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Lights of San Diego from Mt. Palomar
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• Environmentally-Sensitive
  Outdoor Lighting

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LED-powered Roadway Lighting
LED-Powered Roadway Lighting
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I-35 Bridge LED Lighting - Minneapolis
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LED Lighting Lantern Retrofit
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• LED Roadway and Area Lighting

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Correlated Color Temperature (CCT) - Kelvin
Scale
High Efficiency LED Metal Halide Incandescent
High Pressure Sodium
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• High CCT Light Source Issues
• More Glaring
• Greater Scattering of Light
• Higher Impact on Circadian - --- Rhythms

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Quality Outdoor Lighting Requirements

• See the effect, not the source
• No glare!
• Light only where and when needed
• Shine the light down
• Dont over light
• Choose low CCT light sources (4000 Kelvins
  max.)
• Use energy efficient sources Systems

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Terry McGowan, International Dark-Sky
Association www.darksky.org lighting_at_ieee.org