FOOT-CANDLE (FC). A unit of illuminance of equal to one lm/ft² (lumen/square foot) or 10.76 lx (lux).

FULLY SHIELDED (FULL CUTOFF). A fixture constructed (or shielded with an opaque material) so that light rays emitted by the fixture, either directly from the lamp or indirectly from the fixture, are projected only below a horizontal plane running through the lowest point on the fixture where light is emitted.

IESNA. Illuminating Engineering Society of North America.

OPAQUE. Impervious to the passage of light and not reflecting light.

OUTDOOR LIGHT FIXTURE (LUMINAIRE). Artificial outdoor illuminating devices, outdoor fixtures, lamps and other devices, permanent or portable, used for illumination or advertisement. Such devices shall include, but are not limited to: search, spot or floodlights; security lights; parking lot lighting; landscape lighting; recreational areas and pathway lighting; exterior building or structure illumination; street lights; signage lighting; and shall include the complete lighting unit consisting of a lamp or lamps and ballast(s) (when applicable) together with the parts designed to distribute the light, to position and protect the lamps and to connect the lamps to the power supply. Traffic lights are not OUTDOOR LIGHT FIXTURES.

PARTIALLY SHIELDED (PARTIAL CUTOFF). A fixture constructed (or shielded) so that the bottom edge of the lens extends below the bottom plane of the fixture, and that allows some light to extend above the horizontal plane extending from the lowest point on the fixture where light is emitted.

SECURITY LIGHTING. Lighting that is fully shielded that is intended to provide bright illumination during emergency situations only.

SPILL LIGHT. The amount of light that illuminates beyond the range or primary area that the fixture is intended to light.

TRANSLUCENT. Admitting and diffusing light so that objects and the light source beyond cannot be clearly perceived. (Ord. 312 § 2(17.2), passed 4-11-2012. Code 2012 § 152.277.)

(1) All building-mounted light fixtures shall be fully shielded and shielded in such a manner as to avoid creating concentrated light (hot spots) on the structures to which they are mounted. Residential dwellings may install partially shielded light fixtures such as sconces but only at the garage and primary entryway.

(2) Exterior fixtures shall be mounted in or on a building wall no higher than necessary to illuminate the area required.

(3) In commercial districts, within a 15-foot radius of the entry door, there shall be some type of lighting to distinguish the building entrance.

(4) Overhead lighting used to light building overhangs and open canopies (including service station pump island canopies) shall use flat lenses (rather than drop lenses or refractors) and/or be fully recessed within the overhang or canopy.

(1) Wall-mounted security light fixtures shall comply with all requirements outlined in subsection (A) of this section and shall not exceed a mounting height equal to one-third the height of the building wall on which they are mounted. The maximum height of lighting standards (poles) used for security purposes, excluding parking lot lighting, should be 12 feet.

(2) Fully shielded light fixtures that are activated with motion sensors are the preferred type for security lighting for all residential, commercial, industrial and institutional uses rather than dusk-to-dawn type of security lights.

(3) In residential zoning districts the motion sensor security lighting should be controlled separately from all other lighting with the security lights being on timers that regulate their operation time to a maximum of ten minutes and limited to lamps with a maximum of 750 lumens.

(1) Within the “C-2” Commercial and the “L-I” and “H-I” Industrial Zoning Districts the maximum height of parking area lighting standards (poles) shall be 25 feet within the interior of the parking area and 16 feet at or along the perimeter of the parking area. Within the “C-1” and “MU” Zoning Districts or if the parking area abuts a residential zoning district the maximum height of the lighting standards (poles) shall be 20 feet within the interior of the parking area and 12 feet at or along the perimeter of the parking area.

(2) All parking area lighting, serving commercial and industrial uses, shall be turned off one-half hour after the close of the business that the parking area serves or as required for the safety of the employees leaving the business.

(3) Within the multiple residence zoning districts lighting standards (poles) within the parking areas shall be limited to a maximum height of 12 feet. Motion sensor/detector light fixtures are encouraged to be placed under the parking shade canopy to provide both security and parking area lighting.

(1) All lighting fixtures used to externally illuminate an outdoor sign shall be mounted on the top of the sign structure, shall be fully shielded and directed downward;

(2) Internally illuminated outdoor signs shall be constructed with a translucent panel material and wholly illuminated from within in a manner that the bulb or light source from the fixture is not visible. Dark backgrounds with light lettering and warm white and natural lamps are preferred to minimize detrimental effects; and

(3) Backlit advertising outdoor signage is permitted provided the bulb or light source is not visible.

(1) Short bollard-style partially shielded light fixtures or low wattage ornamental twinkle string lighting of specimen trees is preferred to that of building-mounted lighting; and

(2) All outdoor ambience lighting fixtures shall be turned off one-half hour after the close of the business or as required for the safety of the employees leaving the business.

(1) Lighting of outdoor recreational facilities, public or private, shall be turned off one-half hour after the conclusion of the recreational or sporting event or as required for the safety of the employees leaving the facility and shall comply fully with all regulations of this chapter; and

(2) Retention areas used as open space and/or equipped for recreational uses along with the sidewalk or pathways adjoining the basin area should be illuminated in compliance with this chapter. If the retention area is part of a subdivision plat the final plat shall contain a statement noting compliance with these regulations. (Ord. 312 § 2(17.4), passed 4-11-2012. Code 2012 § 152.279.)

(1) Searchlights. The operation of searchlights for advertising purposes.

(2) Mercury Vapor. The installation of mercury vapor fixtures. Existing mercury vapor fixtures are encouraged to be removed and replaced with compliant lighting fixtures.

(3) Signage. Bottom-mounted outdoor light fixtures for any advertising sign lighting.

(4) Security Lighting. Dusk-to-dawn lights (constantly on) are discouraged (motion sensor is encouraged). Unshielded wall-pack-type fixtures are prohibited.

(5) Landscaping. Unshielded floodlight or spotlight fixtures are prohibited.

(6) Floodlighting. Building-mounted floodlights used for area lighting and/or yard security lighting is prohibited unless the floodlight fixture is fully shielded, directed downward, and does not cause or create spill lighting.

(7) Temporary Lighting. Any temporary lighting that violates the provisions of this chapter.

(8) Fixtures and/or fixtures similar to those labeled as prohibited, in Figure No. 3, are prohibited by this chapter.

(1) Fossil Fuel Light (Gas). Lighting produced directly or indirectly by the combustion of natural gas or other utility-type fossil fuels is exempt from the provisions of this chapter.

(2) Holiday Lights. Low-wattage outdoor lighting fixtures for traditional holiday decorations are exempt from the provisions of this chapter and are a permitted lighting installation, including those installed by the City.

(3) Landscape Lighting. Landscape accent lighting consisting of low voltage light fixtures and/or incandescent bulbs under 35 watts are exempt provided they are shielded.

(4) Prison Facilities. Prison facilities are exempt for public safety and security reasons.

(5) Single Residence Homes. Landscape lighting or decorative lighting consisting of low voltage light fixtures and/or incandescent bulbs under 35 watts is exempt from the requirements of this chapter.

(6) Street Lights. Street lights in the public right-of-way, which are governed by the City of San Luis standard details.

(7) Recreational Venues. Lighting standards (poles) for athletic playing fields shall be allowed to exceed the height requirements of this chapter. The maximum illumination limitation level of 30 lux or three foot-candles may be exceeded until 11:00 p.m. No outdoor recreational facility, public or private, shall be illuminated after 11:00 p.m. except to conclude any recreational or sporting event or other activity conducted at the sports venue, outdoor amphitheater, arena, or similar facility in progress prior to 11:00 p.m.