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Public Works/Traffic Operations Safety and Engineering Redmond Traffic Safety Committee ---PAGE BREAK--- Increase Safety and Security ---PAGE BREAK--- Light Emitting Diode (LED) - Semiconductor device that emits light by releasing energy in the form of photons ---PAGE BREAK--- 1. Light source efficiency 2. Life Expectancy 3. Durability 4. Instant ON and OFF operations 5. Light pattern options ---PAGE BREAK--- Lumen = Measure of Light LPW = Lumens per Watt Incandescent (INC) 15 LPW Metal Halide (MH) 70 LPW High Pressure Sodium 55v (HPS) 95 LPW Light Emitting Diode (LED) 130 LPW Typical Lamp Source Typical Efficacy ---PAGE BREAK--- CCT – Correlated Color Temperature CRI – Color Rendering Index (your ability to see color) CCT Lamp Source CRI 5500k - 6500k Daylight 100 4000k - 6000k LED 70 5500k Cool Flourescent 64 3000k - 4000k Metal Halide 65 3000k - 5000k Induction 80 3000k Incandescent 100 2000k HPS 25 Typical ---PAGE BREAK--- ---PAGE BREAK--- HPS LED ---PAGE BREAK--- 1. Evaluated Lighting Performance 2. Evaluated Energy Consumption/Savings 3. Evaluated Maintenance Experience 4. Recommended LED Streetlights for Redmond ---PAGE BREAK--- 6 Manufacturers (5-LED and 1-Induction) 1. American Induction Technologies – (Induction) 2. American Electrical Lighting – LEDR 3. Beta – LEDway 4. Dialight – LED cobra head 5. LeoTek – LED cobra head 6. Lumec - Roadstar ---PAGE BREAK--- ---PAGE BREAK--- ---PAGE BREAK--- ---PAGE BREAK--- ---PAGE BREAK--- ---PAGE BREAK--- ---PAGE BREAK--- ---PAGE BREAK--- ---PAGE BREAK--- Measured foot candles (measure of light) on the pavement at 10 ft. increments. ---PAGE BREAK--- • Met our target foot candles (fc) • Improved our Uniformity (ratio of light and dark spots) ---PAGE BREAK--- Reading Location BEFORE LED Install AFTER (Sept-2010) 1 1.9 1.5 2 1.5 1.1 3 1.0 0.8 4 0.7 0.8 5 0.4 0.5 6 0.2 0.4 7 0.1 0.3 8 0.0 0.2 9 0.2 0.3 10 0.2 0.4 11 0.3 0.5 12 0.6 0.5 13 1.0 0.9 14 1.6 1.1 15 2.2 1.4 16 2.5 1.3 17 2.5 0.8 18 2.1 0.9 19 1.6 1.1 20 1.2 0.8 21 1.0 0.6 22 0.7 0.4 23 0.5 0.2 24 0.4 0.1 25 0.2 0.2 26 0.1 0.2 27 0.0 0.3 28 0.1 0.4 29 0.2 0.5 30 0.5 0.7 31 0.9 1.2 32 1.4 1.4 33 2.0 1.5 34 2.3 1.1 35 1.9 0.8 Green = bright spots Red = dark spots ---PAGE BREAK--- HPS LED (spotlight under the lamp) (controlled light pattern) ---PAGE BREAK--- ---PAGE BREAK--- High Pressure Sodium ---PAGE BREAK--- LED (Beta) ---PAGE BREAK--- HPS LED (Leotek) ---PAGE BREAK--- HPS LED (Beta) ---PAGE BREAK--- High Pressure Sodium LED (Leotek) ---PAGE BREAK--- ---PAGE BREAK--- ---PAGE BREAK--- 150w HPS fixture = 171w total consumption @ $89.88/yr 105w LED fixture = 105w total consumption @ $55.19/yr $34.69 Annual Savings per light or 39% * Based on 2013 Leotek LED test fixture ---PAGE BREAK--- 1. Less maintenance cost 2. Less lane closures 3. Safety for public 4. Safety for staff ---PAGE BREAK--- Hubbell 150w HPS fixture = $175 Leotek 105w LED fixture = $350 No need to re-lamp every 4 years. Saves $100 in labor and equipment costs per light. Operating cost savings of $240/4yrs New Installation = 4 years Retro-Fit Installation = 7 years ---PAGE BREAK--- 1. Improved lighting uniformity 2. Improved color rendering 3. 30%reduction in energy consumption 4. No failures during this test. Less Maintenance. 5. 3-5 year payback on New installation 6. 6-8 year payback on Retrofit installation 7. LED technology is continuing to improve efficiency while lowering cost ---PAGE BREAK--- 1. Installing LED streetlights for new installations 2. Program retrofit installations 3. Continue evaluating improvements in LED streetlight technology ---PAGE BREAK--- Paul Cho City of Redmond Traffic Operations Safety and Engineering [PHONE REDACTED] [EMAIL REDACTED]