Our project is a 238,000 SF brick manufacturing facility in Terre Haute, Indiana. The project consists of 5,000 SF of office space and 233,000 SF of manufacturing area, including extrusion, drying, and kiln equipment. The requirement for INTERIOR LIGHTING indicates "The angle of maximum candela from each interior luminaire as located in the building shall intersect opaque building interior surfaces and not exit out through the windows." This would indicate that light other than that emitted by the angle of maximum candela would be allowed to exit thru non-opaque surfaces. Our building design includes diffuse translucent panels along the perimeter walls which allow 40% transmission of light through them. The angle of maximum candela does intersect these translucent surfaces, but the light is diffused by the panels. Even at the angle of maximum candela, any interior light passing through to the exterior is substantially reduced. Please verify that this meets the intent of the credit by minimizing light trespass from the building.
The project, as described, does not meet the full requirements of the credit. The applicant has quoted the requirements from the initial credit description, but more detailed requirements are laid out in the Approach and Implementation section of the LEED-NC v2.2 Reference Guide SSc8 description, including "preventing light spill through transparent and translucent surfaces to exterior areas" and to "confirm that the maximum candela angle does not intersect transparent or translucent building surfaces that face exterior areas." If it is not possible to alter the building design to meet the requirements described above, it is still possible to achieve the credit using the alternate compliance path presented in "Option 2" of the Interior Building Lighting section in the Reference Guide.