Rating System

LEED BD+C: New Construction

Rating System Version

v2 - LEED 2.2

Inquiry

Our project is located at the intersection of two major arterial streets in an urban renewal area in Salt Lake City. IESNA Zone E-4, or brighter. The project is a four story adaptive reuse / restoration of a 1922 industrial building. The new owner is a general contractor who has embraced urban renewal by investing in an area that would otherwise continue to decay. The immediate neighbors include typical older industrial buildings, some rehabilitated, others not. The area is the host to 3 transient shelters and a rail yard. Immediately adjacent is a city park that attracts transients and other less than desirable traffic. Considering these factors, we have selected site lighting which maintains safety for pedestrians and security of the building and the vehicles parked in the owner\'s parking lot. City street lights illuminate each of the arterial streets bordering the project. These lights are city selected and installed and are acorn type arrays with 3 heads totaling 900 watts (107,000 lumens) of HPS light each. There is no optical direction or cut-off control. In order to respond to site geometry, security concerns, and the transition to brightly lit city streets, 20\' pole mounted lights were located at or near the property perimeter. These lights are 200 watt pulse start metal halide lamps in IESNA full cutoff luminaires with house side shields. Nevertheless there are a limited number of areas where some light trespasses onto the street and an adjacent parking lot. The light trespass level ranges from 0.1 to 0.4 footcandles and is not detectable when standing on site because of the high ambient city lighting. The entire parking are is lighted to comply with the relevant IESNA recommended practice IESNA RP-20-9 8 (Enhanced Security), RP-33, and the 9th Edition of the IESNA Lighting Handbook. We believe that the project responds to both the neighborhood and the credit requirement intention. We would like an interpretation of the SS Cr. 8 requirements with regard to our specific site lighting environment and light trespass situation.