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Solar Parking Lot Retrofit for St Augustine Beach Pier Park

Posted by SEPCO

7/15/14 9:30 AM

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In January of 2012 the City of St Augustine Beach issued plans for the re-lighting of the Pier Park parking lot. The project was officially called “City of St Augustine Beach FL Pier Park lighting retrofit” for the parking lot. The City had just recently completed the construction of a community pavilion and a new sea / beach walkway that ran between the parking lot and beach. The previous use for the area was just a parking lot for access to the pier. With the addition of the pavilion and walkway, with the pier, the area now has a park setting where families can enjoy the beach and picnic in the pavilion. The City also now uses the area for community events, such as arts shows, small outdoor concerts and food events.

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SEPCO worked together with WFLI in Jacksonville to complete the lighting design for the City of St Augustine Beach. The existing lighting consisted of randomly placed 20ft wood poles that had 100 watt high pressure sodium cobra-head style lighting fixtures mounted to them. The new lighting design approach was to use full cut-off LED fixtures of a contemporary style to compliment the pavilion and new landscaping with the following design considerations:

  •          Appropriate pole and luminaire mounting heights.
  •          Pole shape that allowed for various mounting conditions.
  •          Height of solar panels.
  •          Height of adjacent palm trees.
  •          Light source color for general parking area and turtle friendly areas.
  •          Orientation of site on north-south axis.
  •          Luminaire  requirements of having AC and DC drivers.

The height of the new palm trees was determined to be approximately 22 to 24 feet. Our design intent was to have the height of the solar panels be just above the height of the palm trees to ensure sunlight was not blocked. The six poles that had the solar arrays mounted on top of them were 5ft higher than the other AC powered poles. The mounting height of the luminaires was to be 15ft for all fixtures. A round tapered concrete pole was selected for is durability and appearance. This shape pole also allowed for proper southward facing solar panels regardless of which direction the luminaire faced.

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The overall project requirements called for 38 LED fixtures, 6 of which were the amber LED.  Along the sea walkway, the lighting there was to utilize the same LED fixture but using amber LED’s to comply with the turtle friendly lighting requirements. The light levels were designed to IESNA recommendations of 1.0fc average. The LED fixture selected used 73 watts of power. The LED driver used in the fixture was standard 0-10 volt dimming. A 5K color temperature with CRI of 80 was used for the parking area and a 2K color 580nm amber LED used for the sea walk area.

The City had applied to the Department of Energy for a grant to utilize solar power for a portion of this project. They were awarded a grant which allowed them to have 6 of the 38 LED fixtures powered by solar array panels. The 6 fixtures selected for solar power were the ones in the middle of the parking lot as they were the first to be seen upon entry to the parking lot. The project shows the Cities desire to promote “green” initiatives and integrate solar powered lighting as often as possible.

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In addition to the use of LED lighting, part of the project scope was to use a lighting control system that allowed automatic control of the light levels for the standard AC wired fixtures.The AC light fixtures, due to their use of the grid power, dim to 50% intensity part of the night to reduce the standard electrical power consumption. The off grid solar lights utilize enough energy from the solar to provide 100% intensity all night without using any energy from the grid.

Topics: SEPCO News & Information, Parking Lot Lighting, Solar Lighting Design

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