Means the sensation produced by luminance within the visual field that is sufficiently greater than the luminance to which the eyes are adapted to cause annoyance, discomfort or loss in visual performance and visibility.

Means Illuminating Engineering Society of North America, an organization that recommends standards for the lighting industry.

Means any form of artificial illuminance emanating from a light fixture or illuminated sign that penetrates other property and creates a nuisance, as specified in subsection 37-61.3.

Means any direct glare source offensively visible above a height of five (5) feet at the subject property line.

Means an electrically powered illuminating device containing a total light source of more than one thousand eight hundred (1,800) initial lumens per fixture (this is greater than a single one hundred (100) watt incandescent, or two (2) seventy-five (75) watt reflectorized incandescent bulbs), which is permanently installed outdoors, including but not limited to, devices used to illuminate any site, architectural structure or sign.

Means a fixture with cutoff optics that allows no direct emissions above a vertical cutoff angle of ninety (90) degrees above nadir (straight down at a perfect vertical), through the light fixture's lowest light emitting part. Any structural part of the light fixture providing this cutoff angle must be permanently affixed.