Chapter OUTDOOR LIGHTING Sections: DEFINITIONS APPLICABILITY STANDARDS EXEMPTIONS LIGHTING PLAN REQUIRED

Transcription

1 Chapter 4-13 OUTDOOR LIGHTING Sections: DEFINITIONS APPLICABILITY STANDARDS EXEMPTIONS LIGHTING PLAN REQUIRED

2 Chapter 4-13 OUTDOOR LIGHTING Sections: DEFINITIONS APPLICABILITY STANDARDS EXEMPTIONS LIGHTING PLAN REQUIRED : For purposes of this Chapter, the following definitions shall apply: BULB: CANDELA: The source of electric light. To be distinguished from the whole assembly (See Luminaire). Unit of luminous intensity. EXTERIOR LIGHTING: Temporary or permanent lighting that is installed, located or used in such a manner to cause light rays to shine outside. Fixtures that are installed indoors that are intended to light something outside are considered exterior lighting for the purpose of this Chapter. FIXTURE: FLOOD LIGHT: FLUX: FOOTCANDLE: The assembly that holds the lamp in a lighting system. It includes the elements designed to give light output control, such as a reflector (mirror) or refractor (lens), the ballast, housing, and the attachment parts. Light that produces up to 1800 lumens and is designed to flood a well-defined area with light. Generally, flood lights produce from 1000 to 1800 lumens. Unit is erg/sec or watts. Illuminance produced on a surface one foot from a uniform point source of one candela. A unit of illuminance is equal to one lumen per square foot and is measured by a light meter.

3 FULL CUT-OFF FIXTURES: Fixtures, as installed, that are designed or shielded in such a manner that all light rays emitted by the fixture, either directly from the lamps or indirectly from the fixture, are projected below a horizontal plane running through the lowest point on the fixture where light is emitted. GLARE: Intense light that results in discomfort and/or reduction of visual performance and visibility. HOLIDAY LIGHTING: Festoon type lights, limited to small individual bulbs on a string. IESNA: LIGHT: LIGHT POLLUTION: LIGHT TRESPASS: LIGHTING: LUMEN: LUMINAIRE: Illuminating Engineering Society of North America. The professional society of lighting engineers, including those from manufacturing companies, and others professionally involved in lighting. The form of radiant energy acting on the retina of the eye to make sight possible: brightness, illumination, a lamp, etc. Any adverse effect of manmade light including, but not limited to, light trespass, up-lighting, uncomfortable distraction to the eye, or any manmade light that diminishes the ability to view the night sky. Often used to denote urban sky glow. Light emitted by a luminaire that shines beyond the boundaries of the property on which the luminaire is located. Any or all parts of a luminaire that function to produce light. Unit of luminous flux; the flux emitted within a unit solid angle by a point source with a uniform luminous intensity of one candela. One footcandle is one lumen per square foot. One lux is one lumen per square meter. A complete lighting system consisting of a lamp or lamps together with the parts designed to distribute the light, to position and protect the lamps, and to connect the lamps to a power supply.

4 MOTION SENSOR DEVICE: A device that will sense motion electronically and switch on a security light necessary for public health, safety, and welfare for a brief duration. OUTDOOR LIGHT FIXTURE: Outdoor, electrically powered illuminating devices, lamps and similar devices, permanently installed or portable, used for illumination or advertisement. Such devices shall include, but are not limited to, search, spot and flood lights for: Buildings and structures; Recreational areas; Parking lot lighting; Billboard and other signs; Landscape lighting; Street lighting; Building overhangs and open canopies; Product display area lighting. OUTDOOR LIGHTING: Lighting that directly illuminates areas not completely enclosed by a structure. PARTIALLY SHIELDED: The bulb of the fixture is shielded by a translucent siding and the bulb is not visible at all. Light may be emitted at the horizontal level of the bulb. RECESSED: SHIELDED: UP-LIGHTING: When a light is built into a structure such that the light is fully cut-off and no part of the light extends or protrudes beyond the underside of that structure. When the light emitted from the fixture is projected below a horizontal plane running through the lowest point of the fixture where light is emitted. The bulb is not visible with a shielded light fixture, and no light is emitted from the sides of the fixture. Also considered a full cut-off fixture. Lighting that is directed in such a manner as to shine light rays above the horizontal plane.

5 4-13-2: APPLICABILITY (A) This Chapter applies to the following new development, construction, and changes in use, excluding single family dwelling units, farms and ranches: (1) Subdivision pursuant to Chapter 4-7, and specifically Section For subdivisions, deviations from the standards set forth herein may be granted pursuant to Section (B). (2) New construction or addition to existing structures that requires a building permit and site plan pursuant to Chapter 4-1, Section 12. For new construction or addition to existing structures, variances from the standards set forth herein may be granted pursuant to Section (H). (3) Change in use to an existing building, structure or premises which change in use requires a rezone pursuant to Chapter 4-4, Section 27, or a conditional use permit pursuant to Chapter 4-4, Section 24. For rezones and conditional use permits, variances from the standards set forth herein may be granted pursuant to Section (4) Where a use located within a commercial or industrial zone, other than a single family residence, farm or ranch, is abandoned or discontinued for a period in excess of six (6) months, all outdoor and exterior lighting shall be brought into compliance upon resumption of the prior or a substantially similar use, or upon issuance of a building permit : STANDARDS (A) Exterior and outdoor lighting, including illuminated signs, shall be designed, located, installed and directed in such a manner as to prevent light trespass, up-light and glare at any location on or off the property. All such lighting shall be full cut-off fixtures with the light source fully shielded as set forth in the IESNA Guidelines adopted pursuant to Chapter 4-1, Section 1, with the following exceptions: (1) Luminaires that have a maximum output of 260 lumens per fixture, regardless of number of bulbs (equal to one 20 watt incandescent light), may be left unshielded provided the fixture has an opaque top to keep light from shining directly up.

6 (2) Luminaires that have a maximum output of 1,000 lumens per fixture, regardless of number of bulbs (equal to one 60 watt incandescent light) may be partially shielded, provided the bulb is not visible, and the fixture has an opaque top to keep light from shining directly up. (3) For security purposes, floodlights with external shielding may be angled provided that no light escapes above a twenty-five (25) degree angle, measured from the vertical line from the center of the light extended to the ground, and only if the light does not cause glare or light to shine on adjacent property or public rights-of-way. Floodlights with directional shielding, photocells with timers, and motion sensor devices are encouraged. (B) In addition to Subsection (A) above, street lights shall comply with the following: (1) Street lights along both residential and nonresidential streets shall be limited to a one hundred (100) watt high pressure sodium (hps) light, except that lights at the intersection of arterial and/or collector streets shall be two hundred fifty (250) watt hps. (2) The mounting height for street lights shall not exceed sixteen (16) feet from ground level for fixtures that do not protrude over the street, and thirty (30) feet from ground level for fixtures which do protrude over the street. (C) In addition to Subsection (A) above, parking area lights shall comply with the following: (1) Parking area lights shall be no higher than twenty-five (25) feet above the stand/pole at ground level. With the intent of minimizing light pollution and glare, all parking area lights are encouraged to be greater in number, lower in height, and lower in light level, as opposed to fewer in number, higher in height and higher in light level. (D) The maximum height for light fixtures used to light pedestrian walkways, crossings, or trails shall be no higher than sixteen (16) feet above the stand/pole base at ground level.

7 (E) (F) (G) All other freestanding luminaires, including the fixture, shall be no higher than twenty-five (25) feet above the stand/pole base at ground level, except that luminaires used for playing fields shall be exempt from the height restriction, provided all other provisions of this Chapter are met and the light is used only while the field is in use. Building mounted luminaires shall be attached only to walls, and the top of the fixture shall not exceed sixteen (16) feet in height above ground level. Lighting of Gasoline Station/Convenience Store Aprons and Canopies shall meet the recommendations of the IESNA Guidelines for gas station lighting. Light fixtures mounted on canopies shall be surface or recessed so that the lens is flush with the bottom surface of the canopy. Lights shall not be mounted on the top or side of the canopy. The facia of the canopy shall not be illuminated for any purpose with the exception of internally illuminated signage, which shall comply with the provisions of Chapter 4-4, Section 22, Sign Regulations : EXEMPTIONS (A) The following luminaires and lighting fixtures are exempt from the requirements of this Chapter: (1) Holiday lights; (2) Illuminated signs or other lighting installed for the benefit of public health, safety and welfare; (3) Airport lighting; (4) Emergency lighting, providing such lighting is temporary and is discontinued upon completion or abatement of the emergency. (5) Lighting of the American Flag, provided all such lighting shall be selected and installed to shield the lamp(s) from direct view to the greatest extent possible, and to minimize upward lighting and light trespass. (Ord. 2063, )

8 4-13-5: LIGHTING PLAN REQUIRED (A) A lighting plan shall be submitted for all construction or development subject to the requirements of this Chapter. The submission shall contain four complete sets of the following: (1) The location and types of all outdoor and exterior lighting and fixtures, both existing and proposed on the premises, including point by point lighting level print-outs, with calculation areas delineated where required. Where requested by the City, the plan shall also include a mounting height, mounting method, location, type, lumen output, manufacturer s catalog cuts, photometric report with candela distribution, and shielding information; (2) The above required plans and descriptions shall be sufficiently complete to enable the City to readily determine whether compliance with the requirements of this Chapter are met. If such plans, descriptions and data cannot enable this determination, the applicant shall submit further evidence of compliance, as required by the City.