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r . <br /> Sheetl <br /> b, <br /> Elk River Municipal Utilities <br /> LED Signal Light Cost Comparison 10/1/98 <br /> Change Entire Head <br /> Circular Circular Circular Arrow Arrow Arrow Hand only Walk/Not Walk <br /> Red Green Yellow Red Green Yellow Pedestrian Pedestrian <br /> Installation Costs $43 $69 $49 $42 $49 $40 <br /> Material Costs $108 $320 $148 $72 $134 $82 <br /> Total Unit Cost $151 $389 $197 $114 $183 $122 $162 <br /> Minutes on per Hour 29 29 2 44 14 2 45 <br /> Wattage of LED 15 18 25 18 22 30 20 <br /> Wattage of incandescent 150 150 69 116 116 116 116 <br /> Wattage Savings 0.135 0.132 0.044 0.098 0.094 0.086 0.096 <br /> Intersection <br /> TH 169&TH 10 10 7 7 3 3 <br /> TH 169 Main St 12 12 12 8 8 8 12 <br /> TH 169&School St 12 12 12 8 8 8 8 <br /> TH 169&193 Av 14 14 14 4 4 4 12 <br /> TH10&Main St 10 10 10 2 2 2 8 <br /> TH 169& 197 Av 0 15 15 0 4 4 8 0 <br /> Th 10&Jackson 12 12 12 2 2 2 8 <br /> Th 10&Proctor Av 12 12 12 2 2 2 12 <br /> Th 10&Joplin 15 15 15 4 4 4 12 12 <br /> School St&Jackson Av 12 12 12 0 0 0 8 <br /> School St&Freeport Av 10 10 10 4 8 4 8 <br /> Total#of Lights 119 131 131 34 45 41 152 653 <br /> #Lights by Elk River 65.5 73 73 19 25 21 152 <br /> Total Costw/8%Eng $19,407 $55,036 $27,872 $4,186 $8,894 $5,402 $135,739 <br /> ER Cost w/8%Eng. $10,682 $30,669 $15,531 $2,339 $4,941 $2,767 $8,872 $75,800 <br /> Payback in Years ( Electric Savings Only) <br /> Payback @$0.04 3.9 10.5 230.7 2.7 14.3 67.2 2.3 <br /> Payback @$0.05 3.1 8.4 184.6 2.2 11.4 53.7 1.9 <br /> Payback @$0.06 2.6 7.0 153.8 1.8 9.5 44.8 1.5 <br /> Payback @$0.07 2.2 6.0 131.8 1.6 8.2 38.4 1.3 <br /> Currently the incandescent bulbs are changed out every 6 to 12 momths @ 45 to 60 minutes for 3 bulbs <br /> LED lights are projected to last 10 years.Assume they only last 5 years and the Incandescent lights last 1 year, <br /> the labor savings would be approximately$20 x 4 years=$80/light <br /> Payback in Years ( Electric&Labor Savings) <br /> Payback @$0.04 0.4 6.9 75.0 -0.4 3.9 -12.5 -0.9 <br /> Payback @$0.05 0.3 5.5 60.0 -0.4 3.1 -10.0 -0.7 <br /> Payback @$0.06 0.3 4.6 50.0 -0.3 2.6 -8.3 -0.6 <br /> Payback @$0.07 0.2 3.9 42.9 -0.3 2.2 -7.1 -0.5 <br /> Savings per Year $3,401 $3,661 $84 $1,070 $432 $51 $4,793 $13,493 <br /> Project Payback ($75800-$80'653 bulbs)/$13493 = 1.75 Years <br /> Page 1 • <br />