RSA 9-E:1 Definitions.

In this chapter:
I. "Fixture" means the assembly that holds a lamp and may include an assembly housing, a mounting bracket or pole socket, a lamp holder, a ballast, a reflector or mirror, and a refractor or lens.
II. "Fully shielded luminaire" means a luminaire that allows no direct light emissions above a horizontal plane through the luminaire's lowest light-emitting part.
III. "Glare" means direct light emitting from a luminaire that is significantly greater than luminance to which the eyes are adapted which causes reduced vision or momentary blindness.
IV. "Illuminance" means the unit measure of light at a surface.
V. "Light trespass" means light emitted by a luminaire that shines beyond the boundaries of the property on which the luminaire is locate