§ 6.4. Lighting.

A. 

Purpose. All site lighting should be designed and installed to maintain adequate lighting on site and provide security for people and property, through the use of fixtures that are durable, while avoiding the use of tall light fixtures that unnecessarily disperse light to surrounding areas, and preventing the creation of glare on adjacent properties.

B. 

Applicability. All development or redevelopment (a) in any Commercial, Public and Institutional, or Manufacturing zone district, and (b) of a multifamily residential use in any zone district, shall comply with the following standards.

C. 

Design Standards.

1. 

Wall-Mounted Lights. Wall-mounted lights must have fully shielded luminairies (such as shoebox or can-style fixtures) to direct all light downward, and to prevent the light source from being visible from any adjacent residential property or public street. Unshielded wallpack lights are prohibited.

2. 

Direction of Lighting.

a) 

No light source shall be directly visible from any adjacent property located in a residential zone district.

b) 

No light sources shall be directed outward toward property boundaries or adjacent rights-of-way.

c) 

No light source shall provide direct, general illumination of facades of buildings visible from adjacent residential properties. Accent lighting (such as lighting emphasizing building entryways or key features) is permitted.

d) 

Wherever possible, lighting of nonresidential properties should be directed downward. Upward-directed lighting shall not be used to illuminate nonresidential properties, except for low-voltage architectural lighting.

e) 

Architectural, landscape, and decorative lighting used to illuminate flags, statues, or any other objects shall use a narrowly directed light whose light source is not visible from adjacent residential properties or public streets.

3. 

Shielding.

a) 

Exterior. Light fixtures in excess of 60 watts or one 100 lumens shall use full cut-off lenses or hoods to prevent glare and spillover from the project site onto adjacent properties and roadways.

b) 

Interior. No interior light source shall emit light directly onto adjacent residential property.

c) 

Canopies. No light source in a canopy structure shall extend downward further than the lowest edge of the canopy ceiling.

Figure 6-7: Shielding Examples

4. 

Hue. Approved lighting sources shall be color-correct types such as halogen or metal halide. Lighting types of limited spectral emission, such as low-pressure sodium or mercury vapor lights, are prohibited.

5. 

Maximum Initial Lamp Wattage. Maximum initial lamp wattage shall not exceed:

a) 

Residential. Sixty watts for five or fewer parking spaces. One hundred watts for six or more spaces.

b) 

Nonresidential. 250 watts for five or fewer parking spaces. Four hundred watts for six or more spaces.

6. 

Illumination Levels.

a) 

Parking Areas. All lighting in parking areas shall be designed and maintained to produce at least 0.1 footcandle of light at pavement level throughout the parking area. Potentially hazardous locations must be individually illuminated with at least 0.3 footcandle of light. Lights within 100 feet of a residential property line shall be reduced to no more than 0.05 footcandle of light after business hours.

b) 

Spillover Light. Lighting from a property containing a nonresidential primary use shall not create greater than 0.05 footcandle of spillover light at the border with any single-family zone district.

7. 

Uniformity Ratios. The ratio of maximum to minimum lighting on a given property, measured at ground level, shall not exceed 15:1 in any Residential zone district, and shall not exceed 10:1 in any Commercial, Manufacturing, or Special Purpose zone district.

8. 

Canopy Lighting.

a) 

In order to minimize direct glare, light fixtures mounted on gasoline and fuel sales canopies and other canopies shall be recessed so that the lens cover is flush with the bottom surface of the canopy or shielded by the fixture or the edge of the canopy so that light is restrained to 85° or less from horizontal.

b) 

As an alternative (or supplement) to recessed lighting, indirect lighting may be used where light is beamed upward and then reflected down from the underside of the canopy. When this method is used, light fixtures must be shielded so that direct light is focused exclusively on the underside of the canopy and is not visible from any residential use adjacent to or across a street or alley from the subject property, or from any public right-of-way.

c) 

Lights shall not be mounted on the top or sides (fascias) of the canopy. Signing that is in compliance with sign regulations may be placed on these surfaces.

D. 

Height Standards.

1. 

Except as permitted in Subsection 2 below, lighting fixtures shall be no more than 15 feet high whether mounted on poles or walls or by other means.

2. 

Light fixtures in parking lots containing more than 50 spaces shall be no more than (a) 20 feet high if located within 100 feet of the boundary of a residential zone district, or (b) 25 feet high if located 100 feet or more from the boundary of a residential zone district.

[Amended 3-19-2007 by Ord. No. 1822]

3. 

Wherever possible, illumination of seating areas, building entrances, and walkways shall be accomplished by use of bollard-style fixtures or other low, ground-mounted fixtures not over four feet in height.