10-15-4: SHIELDING AND TOTAL OUTDOOR LIGHT OUTPUT STANDARDS:

(A)Shielding Standards: All outdoor lighting fixtures having initial output greater than or equal to two thousand (2,000) lumens shall be fully shielded in all lighting zones. All outdoor lighting fixtures having an initial output less than two thousand (2,000) lumens need not be fully shielded, but shall not be aimed more than forty five degrees (45°) from the surface upon which the fixture is mounted when the source is visible from any off site residential property or public roadway. All outdoor lighting shall be subject to the provisions of subsection (D) of this section not withstanding lumen limits otherwise applicable in this chapter.

(B)Total Outdoor Light Output Standards: Except as otherwise provided in this chapter, the following light output standards shall apply:

1. In the E-3 lighting zone, total outdoor light output shall not exceed two hundred thousand (200,000) initial lumens per acre when all outdoor lighting fixtures are fully shielded and/or twenty thousand (20,000) initial lumens per acre when nonfully shielded lighting fixtures are used.

2. In the E-2 lighting zone, total outdoor light output shall not exceed one hundred thousand (100,000) initial lumens per acre when all outdoor lighting fixtures are fully shielded and/or twenty thousand (20,000) lumens per acre when nonfully shielded lighting fixtures are used.

3. In E-1 and E-2 lighting zones, where there are less than four (4) dwelling units per lot or parcel, total light output shall not exceed ten thousand (10,000) lumens per acre for all types of light fixtures, nor exceed six thousand (6,000) lumens per acre of nonfully shielded light fixtures.

4. Each lot or parcel in the E-1 and E-2 lighting zones shall be allowed a minimum of six thousand (6,000) lumens per lot or parcel, regardless of area.

(C)Acceptable Lamp Types: Metal halide, high pressure sodium, fluorescent, induction incandescent, halogen, and low pressure sodium (allowed when combined with 25 percent white light source to provide proper color rendition). Other bulb types may be substituted with the approval of the community development director.

(D)Foot-Candle Limitations: No more than 0.1 foot-candle of light should be allowed, measured at a point ten feet (10') beyond any property line, as a direct result of on site lighting regardless of what type or types of outdoor lighting fixtures are used. When like commercial or industrial uses abut each other the community development director may waive this requirement if the following criteria are met:

1. The amount of light trespassing the property line is the minimum amount, or less, required to achieve the Illumination Engineers Society of North America recommendation for the proposed task/use.

2. There are no residential uses abutting the subject site and/or the light trespass will not reach the residential use.

(E)Lumens Per Development Acre: "Lumens per development acre" are calculated as follows: Total of the initial lamp lumens for all lamps used, excluding those used for internal sign illumination, those used in display lots, signs, and those under service station canopies, divided by the acreage of the development.

(F)Effective Shielding Standard: All light fixtures that are required to be shielded shall be installed and maintained in such a manner that the shielding is effective as described in the definition in section 10-15-2 of this chapter for fully shielded fixtures.

(G)Light Trespass Standard: Beyond the shielding requirements of this section, all light fixtures shall be located, aimed or shielded so as to minimize stray light trespassing across property boundaries. Any lamp installed on a residential property and visible from any other residential property must be shielded such that light trespass on the other residential property does not exceed the limits of subsection (D) of this section.

(H)Multiuse Lighting Standard: Multiuse lighting must conform to the shielding and timing restrictions, if any, that apply to the most restrictive use being proposed. (Ord. 1, Series of 2003)