Rating System

LEED BD+C: New Construction, LEED BD+C: New Construction, LEED BD+C: New Construction, LEED BD+C: Schools, LEED BD+C: Schools, LEED BD+C: Core and Shell, LEED BD+C: Core and Shell

Rating System Version

v2 - LEED 2.2, v2 - LEED 2.2, v3 - LEED 2009, v2 - Schools 2007, v3 - LEED 2009, v2 - LEED 2.0, v3 - LEED 2009

Inquiry

This project is located in a downtown area with a fair amount of ambient brightness. For a portion of the site, the design team desires to uplight a grove of trees immediately adjacent to the building and some other trees intermittently along one of the main paths through the site. The lights will be narrow or medium floods that keep the lumens below the canopy to fewer than 3500 lumens.\nAs noted in the LEED Credit Ruling dated 3/14/03, some uplighting is allowed as long as the project adheres to all of the other conditions stated in that Credit Ruling.\nThe project will be able to demonstrate that all other Light Pollution Reduction Credit requirements are met, including (1) full cut off luminaires for lamps over 3500 initial lumens and shielding for those over 1000 initial lumens. (2)Use of lighting controls to turn off lighting after hours and/or during post curfew periods. (3) Commissioning of lighting controls .\nThe design team is anticipating minimal use of the uplighting and is setting our curfew for those luminaires at 8:00pm Standard Time and by 10:00pm during Daylight savings time. In addition there may be special events in which the uplighting remains on beyond the curfew specified above. The design team is proposing this schedule, but would be amenable to another schedule if the Credit Ruling Committee deemed one to be more appropriate.\n\nPlease confirm that this schedule and approach are consistent with the USGBC\'s previous credit ruling on this subject.