New Applications Explored for Hybrid Fixture
The LED hybrid fixture was developed by the California Energy Commission's Public Interest Energy Research (PIER) Program. PIER supports energy research, development and demonstration projects which aspire to bring energy efficient products to the marketplace.
The hybrid fixture combines light emitting diode (LED) technology with occupancy and photocell controls for incandescent lighting. Darkness turns on the LEDs to provide general, low-level light and to act as a marker for light fixture recognition at a distance. When motion is detected through the on-board occupancy/light sensor, the incandescent light turns on. After a few minutes of vacancy, the light turns off again leaving only the LEDs on.
The fixture was designed for pathway, porch, and security light applications, and can also accommodate a compact fluorescent bulb. The LED provides 20 lumens/watt of illumination and offers much longer life than that of its traditional incandescent counterparts.
The National Park Service was interested in installing an hybrid LED pathway light at the Wuksachi Lodge area in Sequoia National Park. The lodge is open year-round and is located on the western slope of the Central Sierra at 7,200 feet above sea level. During the winter, the area experiences freezing cold temperatures and snow.
A preliminary technology assessment of the LED hybrid fixture was done at the Southern California Lighting Technology Center to determine if the fixture would be appropriate as a pathway light in a national park setting.
For a full report reference the Led Hybrid Pathway Lighting for Sequoia National Park (PDF) brochure.
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