This path is most feasible if your LEED-CI project occupies the majority of the building, and is executing its own lighting design.
This is a particularly difficult path to comply with because tenants don’t have control over the entire building, or over other tenants’ design and lighting layouts. This compliance path implies requesting lighting power density from all other tenants and measuring light leakage from the windows. It can be time-consuming to document.
Even if the LEED-CI project only involves a portion of a building, the requirements here must be met by the whole building.
Refer to LEED-NC SSc8 for detailed requirements and documentation guidance. However, note that LEED-NC covers exterior and interior lighting, while for LEED-CI; you only need to follow the interior lighting requirements.
Option 2, Path 6: Light Pollution Reduction
Tenants benefit from locating in a building that has reduced its heat island effect, through lower operating costs related to cooling the tenant space.
More and more municipalities require that “cool” or white roofs be installed on new buildings, so the stock of buildings that comply with this requirement should increase over time, making this path easier to follow.
Ask the building owner for specifications on the kind of roofing materials installed and the SRI values of those materials.
There are three compliance paths available to meet the requirements of this path. Tenants can locate in a building with one of the following attributes.
Option 1: 75% of the roof is covered with reflective materials with an SRI value of 29 or greater for pitched roofs or an SRI value of 78 or greater for low-sloped roofs.
Option 2: 50% of the roof is vegetated.
Option 3: A combination of the first two options.
Refer to LEED-NC SSc7.2 for detailed requirements and documentation guidance.