Our project includes existing, historic lampposts that will remain in place. We may be able to adjust the internal components of the lamps to make them more energy efficient, but due to the shape of the lenses, we are concerned that we may not be able to meet the uplight requirements for SS Credit Light Pollution Reduction. I was surprised to find that historic light fixtures are not listed in the exemptions for this credit, and haven't been able to find any addenda or LEED interpretations addressing historic lighting fixtures. Has anyone else had experience with a similar issue on their project?
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Joanna Switzer
Sustainability Project ManagerAtkins
59 thumbs up
October 10, 2018 - 12:06 pm
Have had some success with historic luminaire head replacements/retrofits that qualify as semi-cut-off performance for trespass purposes. Here's one potential resource to contact with inquiries: http://www.springcity.com/product-lines
Feasibility somewhat depends on globe/lantern style. However, it would likely mean ushering in a new standard for the fixtures that the Owner would need to be ready to undertake for future retrofits to ensure consistent appearance/light distribution of any matching fixtures outside the LEED project boundary.
Curious to hear from others, but not aware of any exemptions for historic fixtures in the Light Pollution criteria, particularly if the light fixtures are under the control of the Project owner as opposed to the electric utility/municipality.
Bill Swanson
Sr. Electrical EngineerIntegrated Design Solutions
LEEDuser Expert
731 thumbs up
October 30, 2018 - 9:35 am
There are no exemptions that I know of for historic fixtures. The style of the fixture would have a significant impact on the amount of uplight. I have seen some modern 'dark sky compliant' fixtures with historical themed appearance.
Options:
- This project is not going to earn this credit. Do what you feel is best for the client in renovating the old fixtures.
- Work with a manufacturer that can modify the historic fixture to become compliant. Some companies really like custom projects and the challenge of doing something that hasn't been done before. A local lighting sales rep could direct you to a company. Anything custom does cost more than typical.
- Find a new standard to replace the old fixtures. Tends to cost less and provides the most usable light on the ground.
Elizabeth Kertesz
PresidentResilient Oak Consulting, LLC
9 thumbs up
October 30, 2018 - 11:59 am
Good ideas - thanks for the info, Bill.