§ 28-2. Definitions.

The following definitions are hereby adopted for the purposes of this chapter:

Area lighting means light fixtures located on public or private property that are designed to light spaces including but not limited to parks, parking lots, and sales lots.

Axis of illumination means the midline of the beam emitted by a light fixture.

Beam of a light fixture means the spatial distribution of the emitted light.

Candela (cd) means the unit of measurement of the intensity of a point source of light (approximately equal to one (1) candlepower).

Existing light fixtures means those outdoor light fixtures already installed at the time this chapter is adopted.

Footcandle (fc) means the illuminance measured one (1) foot from a one (1) candela source.

Floodlight means a light fixture having a wide beam.

Full cutoff means a shielded light fixture that emits no light above a horizontal plane touching the lowest part of the fixture.

Glare means visual discomfort or impairment caused by a bright source of light in a direction near one's line of sight.

Horizontal and vertical footcandles mean the illuminance measured by a light meter in those positions (illuminance may also be measured in other specified positions or directions).

Illuminance means the intensity of light in a specified direction measured at a specific point.

Lamp or bulb means a source of light.

Light fixture means the assembly that holds or contains a lamp or bulb.

Light pollution means the sky glow caused by scattered light emitted upward from unshielded or poorly aimed light fixtures.

Light trespass means unwanted light falling on public or private property from an external location.

Lumen means the unit of luminous flux, the total amount of light falling uniformly on or passing through an area of one (1) square foot, each point of which is one (1) foot from a one (1) candela source, yielding an illuminance of one (1) footcandle at that distance (the output of lamps and bulbs is customarily measured in lumens, a common one hundred (100) watt incandescent light bulb, for example, having an output less than one thousand eight hundred (1,800) lumens).

Private lighting means outdoor light fixtures located on property owned or controlled by individual persons, including, but not limited to, families, partnerships, corporations, and other entities engaged in the conduct of business or other nongovernmental activities.

Public lighting means outdoor light fixtures located on property owned, leased, or controlled by the city or other governmental entity or entities, including but not limited to streets, highways, alleys, easements, parking lots, parks, playing fields, schools, institutions of higher learning, and meeting places, and all entities completely or partly funded by grants obtained by the city or its agents from federal, state or private sources.

Sag-lens or drop-lens means a clear or prismatic refracting lens that extends below the lowest opaque portion of a light fixture.

Searchlight means a light fixture having a narrow beam intended to be seen in the sky.

Spotlight means a light fixture having a narrow beam.

Wallpack means a floodlight mounted on the wall of a building or other structure.

(Ord. No. 12-104, 2-14-12)