1. Smart LED Streetlights Arlington County 1

2. Inventory Overview 2

3. What does it mean? 12 Million kWh of electricity per year=2,000 homes. 3 Million dollars in operation and management. A crew of 4 FTE, a fleet of 4 service vehicles, 6,000 service requests. 9,300 Metric tons of GHG (County only – 2,800 Metric tons) = 20 Million pounds. * Considering all 18,000 lights Inventory 3

4. Smart Streetlight System Centrally controlled Improved roadway safety Reduced power consumption and GHG Helps incident and emergency management Proactive maintenance system GIS web based inventory 4

5. Smart Streetlight System 5

6. 150W HPS(180W) 58W LED 68% www.lightingsupply.com http://elementsofgreen.blogspot.com What Are We Doing? 6

7. Residential Group Dusk – 8PM 100% 11PM-Dawn 25% 10PM-11PM 50% 8PM-10PM 75% 80% http://elementsofgreen.blogspot.com Dimming Program 7

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12. What does it mean? * Considering 6,000 County lights only. Power Consumption Savings 12

13. Before 0.7 MkWh = 117 homes $1.8 M in O&M Reduction of 2,350 Metric tons of GHG (5.2 Million pounds) 4 MkWh = 1,333 homes $3.0 M in O&M 9,300 Metric tons of GHG (20 Million pounds) 13 County Target: Emission per capita 13.2 to 3.0 Metric tons by 2050. LED Conversion + Dimming WHAT WE GET? Investment - $6M Payback – 5 years Benefit to cost ratio = 6 Design life – 30 years After

14. CO2 emissions from 300,000 gallons of gasoline consumed. GHG emissions from 500 passenger vehicles. CO2 emissions from 300 homes. 2,350 Metric Tons: A Perspective 14

15. County LED Dom LEDDom HPS ConsumptionkWh20.3 Distribution Service$/ kWh Basic Customer Charges $5.67 Distribution Charges0.03$0.61 Elec. Sup. Service (ESS) ESS Charge0.01$0.20 Rider R, S, T, B, W0.01$0.20 Fuel Factor0.03$0.61 Sales and Surchages$0.01 Total$7.30 Rate Comparison County LED Light58 W Burning hours per year 4,200 Annual consumption per light 243,600 W(243.6 kWh) Consumption / month 20.3 kWh (Tier 3=20-25 kWh) Elec. Cost Per light$1.63($7.30 - $5.67) Basic Cust. Charges$0.19 $5.67 distributed to 30 lights/meter Total$1.82 $3.82 (w/maint) 15

16. Installation Cost for LED: $1,055.22 4-yr Revenue Credit: $680.16 Life of LED 25yrs Current Re-lamping 6yrs Re-lamping Cost: (25/6)x$396.41 =$1,651.71 ($466.41-$100 (cobra lum.)+$30 bulb) Fixture replacement: 3 x $436.41 =$1,309.23 ($466.41 - $30 bulb) Net saving $1,651.71 +$1,309.23 = $2,960.94 Elec cost of County LED: $1.82 Including maint. : $3.82 Rate Calculations for Dominion Electrical cost $1.82 LED luminaire cost $2.77* Total $4.34 Add 25% for maint. $1.09 Total Monthly Cost $5.43 (per light) * (Based on $639.71 luminaire cost and adding 30% profit on top of that) Some $ Facts 16

17. Approx 35million streetlights in the US Each HPS or MV contains: 10 – 100 mg On average, 2,000kg of mercury on the US streets 2000kg not recycled, where does it go? Mercury contents in LED:....................0 kg Mercury Concerns Questions? 17

18. 18 Santosh Neupane(sneupane@arlingtonva.us) Project Manager, Streetlight Engineer 703-228-0778 Arlington County Shahid Abbas (Sabbas@arlingtonva.us) Program Manager, ITS, Traffic Signals and Streetlights 703-228-7588 Arlington County Contact