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MEMORANDUM<br />
ESTIMATED COST ANALYSIS<br />
A. CBBEL evaluated the cost implications as a result <strong>of</strong> the use <strong>of</strong> LED vs. HPS luminaires in<br />
terms <strong>of</strong> initial construction costs and potential future energy and maintenance cost savings.<br />
For the purposes <strong>of</strong> our evaluation, CBBEL has estimated a lifespan for the LED luminaires<br />
to be 18 years and 13 years for HPS.<br />
I. Initial Estimated Construction Cost Utilizing “LED Type” Luminaires in Lieu <strong>of</strong> <strong>Village</strong><br />
Standard HPS Type Luminaires<br />
Additional pole installation cost: 4 poles x $8,000/pole = $32,000<br />
Additional luminaire cost to change from HPS to LED: 25 luminaires x<br />
$100/luminaire = $ 2,500<br />
Reduction in cost due to reduced wire size from 3/C #6 to 3/C #8 = ($10,000)<br />
Installation <strong>of</strong> ComEd meters on the electric service for each lighting<br />
controller: 2 controllers x $1,500 = $ 3,000<br />
Total net estimated additional initial construction cost for LED = $27,500<br />
II. Estimated Potential Energy & Maintenance Cost Savings using LED versus HPS<br />
Luminaires<br />
Annual operating cost reduction based on the $0.03/Kwh charge for<br />
electricity the <strong>Village</strong> pays to ComEd would equal approximately $12<br />
per luminaire. For 25 poles on the new system this would equal $300<br />
per year.<br />
18 year operating cost savings: $300 x 18 years = $5,400<br />
18 year maintenance cost savings from reduced outages: 25 poles x<br />
1.5 average outages for HPS x $100/HPS outage cost (assumed) for<br />
labor and materials = $3,750<br />
18 year energy & maintenance cost savings: $5,400 + $3,750 = $9,150<br />
18 year net overall added cost to change to LED fixtures = $27,500<br />
($9,150)<br />
Total net addition = $18,350<br />
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CHRISTOPHER B. BURKE ENGINEERING, LTD.<br />
9575 W Higgins Road, Suite 600 Rosemont, Illinois 60018-4920 Tel (847) 823-0500 Fax (847) 823-0520