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MEMORANDUM<br />
April 15, 2013<br />
REVISED May 9, 2013<br />
TO:<br />
FROM:<br />
CC:<br />
Lisa Armour, <strong>Village</strong> <strong>of</strong> <strong>Huntley</strong><br />
Greg Sanders, Christopher B. Burke Engineering, Ltd.<br />
Gerry Hennelly, Christopher B. Burke Engineering, Ltd.<br />
Mike Kerr, Christopher B. Burke Engineering, Ltd.<br />
John Caruso, Christopher B. Burke Engineering, Ltd.<br />
SUBJECT: Kreutzer Road Extension Roadway Lighting LED and Solar Options<br />
(CBBEL Project No. 070103.00040)<br />
As requested by the <strong>Village</strong>, Christopher B. Burke Engineering has performed an evaluation <strong>of</strong><br />
the Kreutzer Road street lighting system to include options for use <strong>of</strong> LED luminaries and solar<br />
powered fixtures in lieu <strong>of</strong> the high pressure sodium (HPS) luminaries to match the existing<br />
Kreutzer Road lighting system installed with the Lions Chase subdivision public infrastructure<br />
improvements.<br />
HPS vs. LED EVALUATION<br />
In general, the lifespan <strong>of</strong> a high pressure sodium (HPS) lamp is approximately 13 years based<br />
on operating an average <strong>of</strong> 10 hours per day and a rated lamp life <strong>of</strong> 50,000 hrs. The typical<br />
rated life for LED arrays can range between 50,000 and 100,000 hours (13 to 27 years),<br />
however the manufacturer’s warrantee for most LED retr<strong>of</strong>it assemblies does not address the<br />
entire LED assembly or the specific luminaire it is to be installed in. Therefore, the rated life <strong>of</strong><br />
most current LED products is 50,000 to 70,000 hours (13 to 19 years).<br />
As part <strong>of</strong> CBBEL’s preliminary roadway lighting design submittal a photometric analysis and<br />
pole spacing was developed using the <strong>Village</strong> standard Lithonia Aeris AS2 250 watt (HPS)<br />
luminaire. An average staggered pole spacing <strong>of</strong> approximately 150’ between poles along the<br />
typical 36’ roadway cross section and an average pole spacing <strong>of</strong> 85’ between poles along the<br />
84’ typical cross section was needed to satisfy the <strong>Village</strong>’s roadway lighting ordinance design<br />
requirements. The preliminary roadway lighting design for Kreutzer Road extension requires 21<br />
poles with HPS luminaires.<br />
Lithonia also manufactures an LED option for their Aeris Lighting Series. CBBEL performed a<br />
photometric analysis using Lithonia Aeris AS1 63 LED Array 530 mA luminaire. The calculations<br />
show that a reduction in pole spacing from the originally calculated HPS luminaire system from<br />
150’ to 145’ between poles along the typical 36’ roadway cross section and 80’ between poles<br />
along the 84’ typical cross section was needed to satisfy the <strong>Village</strong>’s roadway lighting<br />
ordinance design requirements. The reduction in pole spacing would require an additional 4<br />
poles to be installed along the length <strong>of</strong> the new roadway section or a total <strong>of</strong> 25 poles with LED<br />
luminaires.<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