NOAO < EDUCATION < FM21.1.05

Advanced Strategies for Outdoor LED Lighting Applications and Technologies to Curtail Regional Light Pollution Effects

LED lighting systems for outdoor lighting applications continue to evolve as do strategies to mitigate related effects upon regional astronomical and ecological assets. The improving availability and relative lumen-per- watt efficiencies of blue-suppressed low correlated color temperature emitters, narrow band amber, phosphor converted amber, and various combinations of broadband emitters and sub-550NM and sub-500NM filters allow for a wide palette of choices to be assessed to suit site-specific and task-specific lighting needs. In addition to static spectral content options, readily available luminaire designs also include precise geometric beam shape selections and adaptive controls to include dimming, dynamic spectral shifting, motion detection, and dynamic beam shaping to minimize total environmental lumen emissions throughout the course of the nighttime hours.

Regional and international light pollution mitigation regulations will also be briefly addressed in the context of luminaire shielding and spectral content control efforts to better protect human quality of life issues as well as astronomical and ecological interests.

The presentation will include numerous spectral content graphs for various luminaire options as well as project- specific case studies to document comparisons of legacy lighting systems versus high-performance LED systems with regard to total lumen emissions, skyglow contributions, energy efficiency, and end-user satisfaction with the installed LED lighting systems. Physical samples of various luminaires will also be available for hands-on assessments.

Christian Monrad

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