Our proposed design for pathway lighting in the middle of a large university campus setting uses pole-mounted IESNA CUTOFF luminaires. The objectives of the lighting design are to provide a safe nighttime environment for students, to minimize light pollution, and to maintain the campus\' historic aesthetic. We understand that the intent of the specific requirement for FULL CUTOFF luminaires is to minimize the amount of upward light pollution. After significant research, we have determined that there are no "period-style" luminaires that match the campus standard and meet Full Cutoff classification, due to the nature of their design. We have also determined that it will not be possible to modify the standard luminaire to meet the full Cutoff classification. In their "Advanced Lighting Guidelines - 2003 Edition," the New Buildings Institute states, "It may be possible to reduce light pollution by using cutoff or semi-cutoff luminaires spaces further apart than full cutoff luminaires can be spaced to achieve the same uniformity." We intend to demonstrate that our proposed lighting design with Cutoff luminaires has less upward light pollution than a design using Full Cutoff luminaires achieving the same lighting uniformity. These two designs will be modeled using Lumen Micro or Radiance software, and the measure of upward light pollution will be the total luminous flux that trespasses the site above the height of the luminaires. If all other requirements of the Sustainable Sites Credit 8 are met, and it can be demonstrated that our proposed design performs as well as a comparable design consisting of Full Cutoff luminaires with respect to upward light pollution, can this credit be attained?
Yes; if all other requirements of the Sustainable Sites Credit 8 are met, and it is demonstrated that the proposed design produces no more upward light pollution than the same design (same luminaire locations and lamping) using Full Cutoff luminaires, then the credit can be attained. Applicable internationally.