Terms related to the required exterior lighting standards contained in this Chapter shall have the following meanings:
(a) Foot-candle. A unit of illumination produced on a surface, all points of which are one (1) foot from a uniform point source of one (1) candle.
(1) Foot-candle, Horizontal. The measurement of foot-candles utilizing a direct reading, portable light meter mounted in the horizontal position.
(2) Foot-candle, Vertical. The measurement of foot-candles utilizing a direct reading, portable light meter mounted in the vertical position.
(b) Full-Shielded or Full-Cutoff Type Fixture. An outdoor lighting fixture that is shielded or constructed so that all light emitted is projected below a horizontal plane running through the lowest light-emitting part of the fixture.
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(c) Glare. Direct light that causes annoyance, discomfort or loss in visual performance and visibility.
(d) Illuminance. The quantity of light arriving at a surface divided by the area of that surface, measured in foot-candles.
(e) Light Pollution. Any measurable exterior artificial illumination that strays beyond a property line both horizontally at grade and vertically to the building height limitation.
(f) Light Trespass. Light in sufficient quantity that crosses over property boundaries, impacts surfaces, and produces a negative response in persons owning or using the impacted space.
(g) Luminaire. A complete lighting unit consisting of a light source and all necessary mechanical, electrical and decorative parts.
(h) Recessed Ceiling Fixture. An outdoor lighting fixture recessed into a canopy ceiling so that the bottom of the fixture is flush with the ceiling.
(i) Light Uniformity Ratios. The uniformity ratio is expressed as either the maximum or average illuminance divided by the minimum illuminance. For example, if the average to minimum ratio is 3:1 and an average illuminance of six (6) foot-candles is desired, the minimum illuminance at any one point must be two (2) foot-candles.
(j) Uplighting. Any light source that distributes illumination above a ninety (90)-degree horizontal plane.
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(Ord. 8-13. Passed 5-14-13.)