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Street Lighting Hercules, CA
 

City of Hercules goes Green with LEDgend Roadway LED lighting


LEDgend installation at Hercules, CA
Many California cities are going green and the City of Hercules joined in by installing energy efficient LED light fixtures to illuminate city streets. Located on the scenic shores of San Pablo Bay, the City sits midway between San Francisco and Napa. Recognized for its beautiful homes and safe neighborhoods, the City of Hercules was designated a “Most Livable Metro-Area Suburb” by Forbes.com.  

Portions of busy Sycamore Avenue and Refugio Valley Road were once illuminated with 161 cobra head type luminaires with 100-watt high pressure sodium lamps. The City of Hercules retrofit the units with contemporary styled LEDgend® Roadway LED luminaires from Holophane, cutting energy usage nearly 40 percent and increasing safety and visibility.

The project was funded by the American Recovery and Reinvestment Act (ARRA) through the Energy Efficiency and Conservation Block Grant Program.

LEDgend luminaires light both two- and four-lane sections of roadway lined with homes, community buildings, businesses, restaurants and strip malls; some areas have parking along the street. The fixtures also illuminate sidewalks, which were plagued with pockets of darkness in the past.

According to Jose Pacheco, assistant civil engineer, City of Hercules, the City had a good working relationship with Holophane and had installed Holophane lighting systems in the past. When the local sales representative recommended LEDgend luminaires to meet the City’s requirements for quality lighting and sustainability, city officials decided to move forward.

LEDgend installation at Hercules, CALEDgend Roadway LED luminaires include permanent prismatic glass optics to protect the LEDs, control light distribution and reduce glare. A thermal management system and lower junction temperature result in longer life and higher delivered lumen output for the LEDs.

The City hired a maintenance contractor to install LEDgend luminaires in the median on existing 30-foot fiberglass poles with six-foot twin arms. The city used existing poles because they were still highly serviceable and more cost effective than installing new poles.

One of the challenges, however, was to provide sufficient illumination levels since poles are spaced 170 feet apart and fixtures are 33 feet above the ground. LEDgend luminaires were specified with Type III wide asymmetric optical distribution and provide .8 footcandles average maintained, with a 4:1 maximum to minimum ratio.  

“The new LED street lights are not only energy efficient but they appear brighter, making our roads safer for motorists and pedestrians,” Pacheco said. “The new fixtures have been installed just a short time and we have already received a lot of positive feedback from the community.”

Light trespass was a concern since a number of houses back up to the roadway. The LEDgend fixtures’ optical control cuts light off at property lines to minimize the illumination that spills onto adjacent properties. The luminaires also provide no uplight.  

Fixtures along Refugio Valley Road have three separate centralized photocontrols to switch luminaires on and off, with luminaires along Sycamore Avenue incorporating individual photocontrols.

LEDgend installation at Hercules, CABecause LEDgend luminaires are designed for a minimum 80,000 hours of virtually maintenance-free operation in a 40ºC ambient, the city should not need to perform regular maintenance on the fixtures for the next 18 to 20 years. 

“We are thrilled that with the use of federal grant funds, the City of Hercules is able to move toward more energy efficient practices,” Pacheco said. “In addition to reducing energy costs, the LED light fixtures are designed to last longer, which means we save in maintenance and replacement costs too.”

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