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An Outdoor Lighting Revolution – The Transition to Solid-State LED Lighting Terry McGowan International Dark-Sky Association

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Presentation on theme: "An Outdoor Lighting Revolution – The Transition to Solid-State LED Lighting Terry McGowan International Dark-Sky Association"— Presentation transcript:

1 An Outdoor Lighting Revolution – The Transition to Solid-State LED Lighting Terry McGowan International Dark-Sky Association

2 The First Electric Outdoor Lighting NYC

3 Menlo Park, NJ December 31, 1879

4 4 Incandescent “Radial Wave” Luminaire 1940s

5 Standard Full Cutoff “Cobra Head” Street Lighting Luminaires

6 Lights of San Diego from Mt. Palomar

7 7 Environmentally-Sensitive Outdoor Lighting

8 LED-powered Roadway Lighting LED-Powered Roadway Lighting

9 I-35 Bridge LED Lighting - Minneapolis

10 LED Lighting – Lantern Retrofit

11 LED Roadway and Area Lighting

12 Correlated Color Temperature (CCT) - Kelvin Scale High Efficiency LED Metal Halide Incandescent High Pressure Sodium

13 13 High CCT Light Source Issues:  More Glaring  Greater Scattering of Light  Higher Impact on Circadian Rhythms

14 Quality Outdoor Lighting Requirements  See the effect, not the source  No glare!  Light only where and when needed  Shine the light down  Don’t over light  Choose low CCT light sources (4000 Kelvins max.)  Use energy efficient sources & Systems

15 15 Terry McGowan, International Dark-Sky Association


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