The “IES” (Illuminating Engineering Society of North America) Lighting Handbook, most recent edition, the city of Omak zoning code, and the building code shall be used for the definition of terms used in this chapter but not defined herein. In the case where a definition of a term of this chapter is found to be in conflict with a definition of a term of any other ordinance, “IES” handbook or regulation, the more restrictive definition will apply.
“Area light”means light that produces over two thousand fifty lumens. Area lights include, but are not limited to, street lights, parking lot lights and yard lights.
“Automatic timing device”means a device that automatically controls the operation of a light fixture or fixtures, circuit or circuits. Photocells and light and/or motion sensors shall be considered automatic timing devices.
“Average foot-candle”means the level of light measured at an average point of illumination between the brightest and darkest areas. The measurement can be made at the ground surface or at four to five feet above the ground surface.
“Bulb”means the source of electric light to be distinguished from the whole assembly (see “Luminaire”).
“Exterior lighting”means 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 out-side are considered exterior lighting for the intent of this chapter.
“Fixture”means the assembly that holds the lamp in a lighting system. It includes the elements designed to give light output controls, such as a reflector (mirror) or refractor (lens), the ballast, housing, and the attachment parts.
“Floodlight”means a light that produces up to one thousand eight hundred lumens and is designed to “flood” a well defined area with light. Generally, floodlights produce from one thousand to one thousand eight hundred lumens.
“Foot-candle”means illuminance produced on a surface one foot from the uniform point source of one candela measured by a light meter.
“Full cut-off fixture”means a fixture which, as installed, gives no emission of light above a horizontal plane.
Glare (Direct).“Direct glare” is defined as the visual discomfort resulting from insufficiently shielded light sources in the field of view.
“Holiday lighting”means festoon-type lights, limited to small individual bulbs on a string, where the output per bulb is no greater than fifteen lumens.
“Illuminance”means density of luminous flux incident on a surface. Unit is foot-candle or lux.
“Illuminating devices”means:
(1) Light Fixture Types.
(A) Full Cut-off Fixture Types. A fixture which, as installed, gives no emission of light above a horizontal plane.
Floodlights and Spotlights. Fixtures defined as having a full beam width or beam spread of less than one hundred ten degrees.
Lamp Types.
(A) Incandescent Lamps. Lamps which produce light via an electrically heated metallic filament.
Fluorescent Lamps. Lamps that use fluorescence of a phosphor to produce visible light.
High Intensity Discharge Lamps. Lamps which produce visible light directly by the electrical heating or excitation of a gas. Examples of such lighting include, but are not limited to, metal halide, high-pressure sodium, low-pressure sodium and mercury vapor. For purposes of this chapter, fluorescent lights are not considered HID lighting.
“Lamp” or “bulb”means the light-producing source installed in the socket portion of a luminaire.
“Light pollution”means any adverse effect of man-made light including, but not limited to, light trespass, uplighting, the 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.
“Lighting”means any or all parts of a luminaire that function to produce light.
“Lighting trespass”means light emitted by a luminaire falls where it is not wanted or needed or shines beyond the property where the luminaire is installed.
“Lumen”means a 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 foot-candle is one lumen per square meter.
“Luminaire”means the complete lighting unit, including the lamp, the fixture, and other parts.
Luminance.At a point and a given direction, the luminous intensity in the given direction produced by an element of the surface surrounding the point, divided by the area of the projection of the element on a plane perpendicular to the given direction. Units: candelas per unit area. The “luminance” is the perceived brightness that we see, the visual effect of the illuminance, reflected, emitted or transmitted from a surface.
“Measurement”means:
(1) Lamp Output.
(A) Total Output. Measurement of total output is in lumens. This should be understood to be the initial lumen value for the lamp.
Illuminance. Measurements of illuminance are expressed in initial lumens per square foot. (A desktop illuminance of twenty initial lumens per square foot is adequate for most purposes.)
In measuring illuminance, the light detector should be pointed at the light source or sources. The intervening light path should be free of obstruction. |
“Outdoor light fixture”means an outdoor illuminance device, outdoor lighting or reflective surface, luminous tube, lamp or similar device, permanently installed or portable, used for illumination, decoration, or advertisement. Such devices shall include, but are not limited to, lights used for:
(3) Buildings and structures;
Billboards and other signs (advertising or other);
Product display area lighting;
Building or structure decoration;
Building overhangs and open canopies.
“Recessed”means a light built into a structure or portion of a structure such that the light is fully cut off and no part of the light extends or protrudes beyond the underside of a structure or portion of a structure.
“Partially shielded”means 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.
“Shielded”means 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.
“Spotlight” or “floodlight”means any lamp that incorporates a reflector or a refractor to concentrate the light output into a directed beam in a particular direction (see definition for “Floodlight”).
“Temporary lighting”means lighting that is intended to be used for a special event for seven days or less.
“Uplighting”means lighting that is directed in such a manner as to shine light rays above the horizontal plane.
(Ord. 1598 § 1 (part), 2007)