
The City of Ann Arbor (MI) has been running a pilot project to try out LED street lights in one of the first such installations in the country. The City's supervisor of signs got the manufacturer of some of the city's downtown streetlights to create a retrofit lamp that used LEDs.
LEDs may not be the most efficient form of lighting in terms of lumens per watt, however their extremely long life makes them more economical to operate over their span of operation because they need to be changed so infrequently, and LEDs can provide a more pleasant spectrum of light than sodium lamps do.
The downtown globe lights have had small placards soliciting public feedback attached to them since the test started at the beginning of the year. According to the local newspaper, only three comments received have been negative, and the department has been getting inquiries about the lights from across the U.S. as well as Canada and Europe.
The city hopes to be able to cut its $1.39 million street lighting budget in half by switching to LED street lighting, and that accounts for just the energy savings. Maintenance savings will allow crews to be able to concentrate more on other projects within the city.

Up to 50,000 Hour Voyager 38 - Energy Saving Site / Roadway Hi Power LED Retrofit
38W = 100W HPS
Fully encapsulated. Mogul E39/E40 Base. 100-277V. 38W . Available only in Daylight DL (5500K). Replaces 100W HPS.
LED-CFLM-120-38-42-DL
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Up to 35,000 Hour Energy Saving
Site / Roadway / Post Top
LED Retrofit
25W = 70W-100W HPS
35W = 125W-150W HPS
Fully encapsulated. LED SMD E27 Base. AC100 - 240V. 25W and 35W. Available in Soft White (3500K) and Daylight (5500K). Replaces 70W HPS (8011 and 8012), or 150W HPS (8013 and 8014).
LED-8011
LED-8012
LED-8013
LED-8014
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Up to 35,000 Hour Energy Saving Site / Roadway Hi Power LED Retrofit
22W = 100W HPS
Fully encapsulated. E27 Base. 100-240V. 22W . Available only in Daylight DL (5000K). Replaces 100W HPS.
LED-8015
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Up to 50,000 Hour Energy Saving
Site / Warehouse / Garage
LED Retrofit
40W = 175W HPS
Fully encapsulated. LED Mogul E39 / E40 Base. AC100 - 277V. 40W. Available in Daylight (5000K). Replaces 175W HPS
LED-8040
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Up to 50,000 Hour Energy Saving
Site / Warehouse / Garage
LED Retrofit
100W = 250W HID
Fully encapsulated. LED Pendant Hook with 6' Cord Mounting. AC100 - 277V. 100W. Available in Daylight (5000K). Replaces 250W HID
LED-8050
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