Led Street Lighting

STREET LIGHTING ALGONA , IOWA, U.S.A

Sumedha guptaRashika dhillonDrishti jain

Located in North Central Iowa – 2 Hours north of

Des Moines, IA • Population: 5,560 • Electric, Water and Communications

Utilities owned and operated by Algona Municipal

• Street Lighting operated and maintained by

Algona Municipal Utilities and funded by the Cityof Algona

Algona Project Goals• Reduction in energy and maintenance cost• Improvement in lighting quality• High quality LED lighting with 10 yearWarranty

Challenges for Algona• Variety of fixtures and claims:• Vendor pressure• Up-front price deterrent• Need for accessible technical resources for goodroadway lighting practices:• Lack of local expertise – staff• Upfront cost• Community interest

More Challenges• all fixtures had to be installed byJuly 31, 2012• Luminares must meet Buy American standards• Algona had to demonstrate that the luminareshad a simple pay back within the life of thefixture• Algona wanted confidence that community wouldaccept project: luminares will provide improvedlighting

STREET LIGHTS

A street light, lamppost, street lamp, light standard, or lamp standard is a raised source of light on the edge of a road or walkway, which is used to provide light when it is needed. Modern lamps may also have light-sensitive photocells that activate automatically when light is or is not needed: dusk, dawn, or the onset of dark weather. This function in older lighting systems could have been performed with the aid of asolar dial. Many street light systems are being connected underground instead of wiring from one utility post to another.

High pressure sodium (HPS) lamps are the most efficient member of the HID family where some degree of color rendition is important. Standard HPS lamps produce a golden white light when they reach full brightness. Many recognize them as the familiar golden light from street lights, one of their principal applications Disadvantages

The light produced is a golden white color, which may not be appropriate for certain applications.1.Requires a ballast.2.Once started can take from five to ten minutes to reach full light output. They also require at least a one minute cool-down to re-strike.3.End of life is characterized by on-off-on cycling, and continued operation can damage the lamp ballast if not replaced quickly.

THE SOLUTION LED RETROFIT – ITS IS ESSENTIALLY

REPLACING THE LIGHT SOURCE WHICH MAY BE A BULB , LAMP ETC BUT NOT CHANGING THE FIXTURE , WHICH SAVES MONEY.

Same fixture

LED BULB

Algona Project Results

–447 LED lights installed in Algona.–Luminaires expected to result in annual energy savingsof approximately 234,254 kWh (42% savings)–Life expectancy greater than 20 years–Project funds invested expected to realize a simplepayback well within the life of the fixture based onenergy savings alone.–Luminaires expected to yield significant annualoperation and maintenance savings for the participatingcommunity

ALGONA - BEFORE

ALGONA - AFTER