lighting zone (exterior lighting)

[11.7.2] In exterior lighting: One of several categories (descriptive and/or prescriptive) that designate outdoor ambient light levels. (Refer to lighting zone guidelines in the Model Lighting Ordinance User Guide, http://www.darksky.org/our-work/public-policy/mlo/.)

light trespass

[11.7.1] The encroachment of light, typically across property boundaries, causing annoyance, loss of privacy, or other nuisance.

VASIS

[11.2.2.3.2]  [See Visual Approach Slope Indicator System (VASIS).]

obstruction beacon

[11.2.2.2.7]  [See hazard or obstruction beacon (aeronautical lighting).]