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Street Lighting Harmony, Florida

Street lighting with full cutoff optics maintains
environmental "harmony" within Florida development

Developers of the picturesque Town of Harmony—just a 30-minute drive from Orlando—want the community’s night skies to remain among the darkest in the nation. The new development, which encompasses 11,000 acres of pristine and protected wilderness, is constructed near a wetland and has two 500-acre, 4,000-year-old lakes within its borders.

“When we first drove out to the area, we were impressed with how dark the sky is at night,” said Greg Golgowski, conservation director for the Town of Harmony. “We wanted to make sure that after the town was constructed, residents could still sit on their front porches at night and look up and enjoy the stars.”

According to Golgowski, excessive urban lighting is not just a nuisance for those who enjoy star-gazing, but it can have grave environmental consequences for wildlife—especially bird species that rely on the stars for navigation.

To maintain Harmony’s dark skies and pastoral environment, Greg Gamble, landscape architect with the Evans Group, Orlando, worked with the Orlando Utilities Commission (OUC) to install Hallbrook® Extended luminaires with Illuminating Engineering Society of North America (IESNA) full cutoff optics along the community streets. The contemporary-styled fixtures—provided by Holophane—are designed with an “extended” reflector and prismatic glass optics to meet dark skies requirements.

The Hallbrook fixtures are mounted on 18-foot black concrete posts with banner arms and spaced 100 feet on center along Harmony’s tree-lined entrance boulevard. They are installed on 13 1/2-foot posts and arranged in staggered patterns in neighborhoods and along the town center, dubbed Harmony Square. The luminaires use 100-watt high-pressure sodium lamps.

“Many cities and towns are specifying metal halide fixtures for street lighting because they like the whiter illumination,” said Gamble. “The lighting fixtures create a soft, comfortable glow that makes the community very suitable for walking at night, yet does to affect the migratory birds.”

Illumination levels are 1.5 footcandles. The lighting fixtures are controlled by a photocell that illuminates them from dusk until dawn. To date, more than 200 Hallbrook Extended luminaires have been installed in Harmony as part of the first phase of the development, which includes 1,000 acres.

“The lighting system allows us to place an urban design with adequate illumination for homeowners in a very natural environment without detracting from or disturbing that environment,” Gamble said. “Harmony is the largest private community in the nation to adopt such progressive anti-light pollution policies.”

OUC is responsible for maintaining and group re-lamping the Hallbrook Extended luminaires as part of its lease-purchase agreement. The utility, which has offered lighting systems as a value-added service to its customers for more than four years, now offers the Hallbrook Extended fixtures as part of its product line.


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