National Trends LED STREET LIGHTING LATEST DEVELOPMENTS 2/23/2010. LED Streetlights Why all the Hype?

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1 ITE/IMSA ANNUAL JOINT MEETING AND VENDOR EXHIBITION MONDAY, FEBRUARY 22, 2010 LED STREET LIGHTING LATEST DEVELOPMENTS Edward Smalley, LC Manager, Streetlight Engineering Seattle City Light LED Streetlights Why all the Hype? Huge Projected Energy Savings! Huge Projected Maintenance Savings! Huge Projected Increase in Light Quality! Hurtles? Drawbacks? 1 2 DOE LED Technology Roadmap 200 cy (lm/w) Efficac Laboratory Projection - Cool White Commercial Product Projection - Cool White Commercial Product Projection - Warm White 50 Laboratory - Cool White Commercial Product - Cool White Commercial Product - Warm White Maximum Efficacy - Warm White Maximum Efficacy - Cool White Year US Department of Energy 2009 Multi-Year Plan for SSL 3 4 National Trends L.A., S.J., S.F., Seattle, Chico Pittsburgh, Wichita, Boise... US DOE is leading efforts to raise the profile of this technology as they believe this will save energy nationwide Many US cities deciding to move to LED streetlights US DOE has announce the creation of the Municipal SS Street Lighting Consortium to help bring agencies up to speed 5 Slide Courtesy Mark McClear of CREE 6 1

2 What s the Difference? LIGHT QUALITY 7 8 Solid State Lighting L.A. Test (pictures all taken with the same camera using exactly the same settings) 9 Slide provided by: Jim Terry 10 Other LED Gains Direct light allows for higher luminaire efficiency Easier to meet Dark Sky guidelines White light provides for better night visibility and light quality No hazardous waste material in system Reduced Carbon Emissions Big LED Gain! The cooler you keep them the longer they last They loves them some cool NW night time temperatures!

3 I-35W Bridge, Minneapolis, Minnesota 52 year lumenaire design life /buildings/ssl/gatewaydemos _results.html The Good, The Bad and the Ugly HPS LED CRI Low ~22 Good ~ CCT Low k Variable k Service interval Every 4-5 years As long as 15 years End of Cycles, then goes out Continuous Life depreciation Failure Lamp or Ballast mode History Since the late 1960s Solid State electronic driver Since the early 2000s Slide provided by: Jim Terry : Year of Standards Implementation Three major standards were published in 2008: ANSI C : Chromaticity of Solid State Lighting g Products IES LM : IESNA Approved Method for Measuring Lumen Maintenance of LED Light Sources IES LM : IESNA Approved Method for the Electrical and Photometric Measurements of Solid- State Lighting Products 16 IES LM Implementation Some Independent Testing Labs Some LED Fixtures Available LEDs being a new light source bring new shape options to outdoor lighting 17 Slide provided by: Jim Terry 18 3

4 Going Retro Cobra head retrofit Thermal problems Missed Type II pattern Surf Board LED Fixture Thermal problems solved Still missed Type II pattern Simple Retrofits of Existing Fixtures Normally Do Not Work NEMA Type 5 LED Retrofit HID/LED Fixture IESNA Type II roadway spec Slide Courtesy Mark McClear of CREE 19 Slide Courtesy Mark McClear of CREE20 Cobra Head Retrofit Slide Courtesy Mark McClear of CREE What About Seattle Began testing LED Streetlights in 2007 Over 100 installed to date Will install 5000 in Current System Status SCL Lighting Types by Use 84,000 Total Fixtures 80% of existing system was installed as part of Mercury Vapor (MV) to High Pressure Sodium (HPS) conversion and is well over 20 years old Pedestrian and Special Lighting 11,705 (14%) a Arterial Cobra Head Lighting 31,447 (37%) Residential Cobra Head Lighting 40,783 (49%)

5 Seattle LED SL Program Targets Reduce energy use 40% Target Low maintenance: Only cleaning during fixture life reduces costs Longer life without t lamp change (12+ years) improves customer service LED Streetlights are Solid State which allow for better and less expensive controls and monitoring Seattle Energy Targets Current System Energy Use: 89,878,191 kwh Annual Energy Cost: $4m Targeted Annual Energy Savings: 40% Projected Annual Energy Cost Savings: $1,6m Conservation Contribution Based on Energy Savings: $7.2m Sample System Annual Cost Target LED Streetlight Annual Costs* SECTION B - ANNUAL SYSTEM COST (POWER, CIP AND MAINTENANCE) % of Total 1 Power Cost = (burning hours)(kw)($/kw) $ 4,043, % 2 System Management - Monitoring and Contols cost $ - 0% 3 Capital Cost (CIP) - System Replacements $ 2,862, % 4 Operating Cost (O&M) - Other Failures and Damage $ 819, % 5 Mantinance - Lamp Rep, PE, Cleaning Cost($117*25%Fix) $ 2,454, % 6 Maintenance - Luminaire Cleaning Cost ($35*12.5% Fix) $ - 0% Total Annual Cost $ 10,180, % SECTION B - ANNUAL SYSTEM COST (POWER, CIP AND MAINTENANCE) % of Total 1 Power Cost = (burning hours)(kw)($/kw) $ 2,426, % 2 System Management - Monitoring and Contols cost $ 35, % 3 Capital Cost (CIP) - System Replacements $ 2,862, % 4 Operating Cost (O&M) - Other Failures and Damage $ 819, % 5 Mantinance - Lamp Rep, PE, Cleaning Cost($117*25%Fix) $ - 0% 6 Maintenance - Luminaire Cleaning Cost ($35*12.5% Fix) $ 367, % Total Annual Cost $ 6,510, % Drawbacks Cost! Many units are still in their Beta stages Some concern around higher Kelvin (K) temperatures and health. (Moon light is at 4125K) High Angle Lumens in some units Hurtles Public acceptance of cooler color. Most efficiencies are gained in the colder light temperatures (near 6000K) Integration of controls to save even more energy (initial vs. mean lumens)

6 Controlling Drive Current to Maintain Constant Lumens Where to From Here? Look for more improvements quarterly If you didn t think it was ready last year, it may be now Compare your system and learn more You may want to consult a lighting consultant that is Lighting Certified (LC) by NCQLP to assist you Where to get more info DOE GATEWAY Demos waydemos_results.html Department of Energy Department of Energy Municipal Solid- State Street Lighting Consortium ewaydemos_consortium.html (coming soon..) ITE/IMSA ANNUAL JOINT MEETING AND VENDOR EXHIBITION MONDAY, FEBRUARY 22, 2010 Thank You! Questions? Edward Smalley, LC Manager, Streetlight Engineering Seattle City Light Edward.Smalley@Seattle.gov