(a) Purpose. The purpose of the lighting standards is to coordinate and unify the overall lighting appearance of nonresidential developments with regard to aesthetic and technical aspects. Site lighting components should be visually interesting and serve not only to illuminate the parking and drive areas, but also to enhance the aesthetic appearance of the site. Fixtures shall be of a design complimentary to the intent of the Nonresidential Design Standards.
(b) Applicability. All developments with ten or more parking spaces are required to provide exterior lighting for all exterior doorways, pedestrian pathways, and vehicular use areas. All developments with less than ten parking spaces shall provide exterior lighting at all exterior doorways.
(c) Requirements. All exterior lighting shall meet the following standards and shall be demonstrated on all plan submittals:
(1) Minimum illumination. A minimum illumination of 0.5 footcandles shall be maintained when measured at grade in all vehicular use areas and pedestrian pathways. Actual site measurement compliance shall not drop below this minimum stated. For design purposes, the light loss factor (LLF) shall be calculated to 0.8 LLF.
(2) Maximum illumination. Lighting uniformity shall not exceed 10:1 maximum to minimum light levels and 4:1 average to minimum light levels. The maximum foot-candle level shall be 10.0, with higher foot-candle levels approved on a case-by-case basis per the latest Illumination Engineering Society of North American Lighting Handbook.
(3) Maximum illumination at property lines. Light originating on a site shall not trespass beyond the site to exceed the following values when measured at grade ten feet beyond the property line for the following adjacent property types:
A. Residential: 0.3 footcandles;
B. Multi-family: 0.5 footcandles; and
C. Office/commercial/industrial: 1.0 footcandles.
(4) Maximum height. The height of the light pole shall be determined by the size of the building as follows:
A. Lighting fixtures for buildings smaller than 15,000 square feet shall not exceed the height of the building or twenty-five feet including the base, whichever is less.
B. Lighting fixtures for buildings 15,000 square feet or larger shall not exceed the height of the building or thirty-seven feet including base, whichever is less.
(5) Fixture type.
A. All pole mounted fixtures used in nonresidential developments except for industrial buildings shall be cut-off style of a traditional or historic reproduction using a gooseneck style arm on decorative poles with a clam shell base.
B. Light fixtures and poles for industrial buildings shall be encouraged to be of a similar type as described above in A.; however, other fixtures which are compatible with the architecture and scale of the building and adjacent buildings and their fixtures may be considered by the City on a case-by-case basis.
C. The style of the adjacent development's light fixture should be taken into consideration on all nonresidential developments to promote consistency throughout the City. (See Figure 44 for examples of preferred types.)
FIGURE 44
Source: Visionaire Lighting. Documents can be found at www.visionairelighting.com
D. Wall pack light fixtures should be compatible to the light pole fixtures and comply with the maximum spill over illumination requirements.
E. All luminaries shall be high-pressure sodium or metal halide. The design shall be refractive or opaque.
F. No colored or flashing lights shall be used to illuminate the exterior of buildings.
G. All exterior lighting used to light vehicular use areas and pedestrian pathways shall be decorative post and arm construction of cast aluminum, cast iron, or cast steel. If posts are to be directly mounted in parking areas without buffers cast iron or steel poles shall be used for durability and safety.
H. Lighting required by the Building Code for emergency egress (when operating in emergency conditions) and light sources which do not exceed 2300 initial lumens or 4000 main beam candlepower are exceptions to this requirement.
(Ord. 2014-27. Passed 8-5-14.)