23.50A.260

A. Exterior lighting shall be shielded and directed away from lots in adjacent residential zones. B. Interior lighting in parking structures shall be shielded, to minimize nighttime glare affecting lots in adjacent residential zones. C. When nonconforming exterior lighting in an UI, II, or IC zone is replaced, new lighting shall conform to the requirements of this Section 23.50A.260 . D. Glare diagrams which clearly identify potential adverse glare impacts on residential zones and on arterials shall be required when: 1. Any structure is proposed to have facades of reflective coated glass or other highly reflective material, and/or a new structure or expansion of an existing structure greater than 65 feet in height is proposed to have more than 30 percent of the facades comprised of clear or tinted glass; and 2. The facade(s) surfaced or comprised of such materials either: a. Are oriented towards, and are less than 200 feet from, any residential zone, and/or b. Are oriented towards, and are less than 400 feet from, a major arterial with more than 15,000 vehicle trips per day, according to Seattle Department of Transportation data. E. When glare diagrams are required, the Director may require modification of the plans to mitigate adverse impacts, using methods including but not limited to the following: 1. Minimizing the percentage of exterior facade that is composed of glass; 2. Using exterior glass of low reflectance; 3. Tilting glass areas to prevent glare which could affect arterials, pedestrians or surrounding structures; 4. Alternating glass and nonglass materials on the exterior facade; and 5. Changing the orientation of the structure. ([Renumbered from 23.50A.026]; Ord. 126862 , § 8, 2023.)