New York Codes, Rules and Regulations
Title 9 - EXECUTIVE DEPARTMENT
Subtitle G - Office of General Services
Chapter V - Design And Construction Group
Part 312 - Restrictions on the Luminous Power of Lighting Fixtures
Section 312.2 - Definitions

(a) Direct light means light emitted by a fixture from the lamp, from a reflector, or through a refractor.

(b) Facade lighting means permanent outdoor fixtures that are specifically intended to illuminate the exterior surfaces of buildings or structures.

(c) Fully shielded fixture means a fixture that allows no direct light from the fixture above a horizontal plane through the fixture's lowest light-emitting part, in its mounted position.

(d) Fixture lumens means total lumens emitted by a fixture.

(e) Glare means light emitted by a fixture that causes discomfort or reduced visibility.

(f) Illuminance means the luminous power incident per unit area of a surface.

(g) Lamp means a light bulb or other component of a fixture that changes electricity into visible light.

(h) Light trespass means light that falls beyond the property it is intended to illuminate.

(i) Lumen means a standard unit of measurement of the quantity of light emitted from a lamp.

(j) Fixture means a complete lighting unit, including a lamp together with the parts designed to distribute the light, to position and protect the lamp and to connect the lamp to the power supply.

(k) Ornamental roadway lighting means a roadway lighting fixture that serves a decorative function in addition to a roadway lighting function, having an historical period appearance or decorative appearance.

(l) Parking-lot lighting means permanent outdoor fixtures specifically intended to illuminate uncovered vehicle parking areas.

(m) Permanent outdoor fixture means a fixture for use in an exterior environment installed with mounting not intended for relocation.

(n) Roadway lighting means permanent outdoor fixtures specifically intended to illuminate public roadways.

(o) Sky glow means a condition caused by light directed upwards or sideways reducing one's ability to view the night sky.

(p) State agency means any State department, office, board, commission, agency, or a public authority or public benefit corporation at least one of whose members is appointed by the governor.