1998-04-01-ATM-min - Laserfiche WebLink

Browse Search

a. enhance public safety and welfare by providing for adequate and appropriate outdoor lighting, b. provide for lighting that will complement the character of the town, c. reduce glare, d. minimize light trespass, and e. reduce the cost and waste of unnecessary energy consumption. 14.2 APPLICABILITY, TERMINOLOGY The requirements of this section shall apply to outdoor lighting on lots and parcels in all districts but shall not apply to: a. one and two family dwellings on lots on which they are the principal use, or b. street lighting, lights that control traffic or other lighting for public safety on streets and ways. When an existing outdoor lighting installation is being modified, extended, expanded, or added to, the entire outdoor lighting installation on the lot shall be subject to the requirements of this section. 14.2.2 TERMINOLOGY In addition to the terms defined in Section 2, Definitions, of this By -Law, the following words, which are technical terms applying to lighting, which are set forth below, shall have the meaning indicated below. Although set forth here for convenience, the terms shall have the same effect as if set forth in Section 2, Definitions. COLOR RENDERING INDEX (CRI): A measurement of the amount of color shift that objects undergo when lighted by a light source as compared with the color of those same objects when seen under a reference light source of comparable color temperature. CRI values generally range from 0 to 100, where 100 represents incandescent light. CUTOFF ANGLE: The angle formed by a line drawn from the direction of the direct light rays at the light source with respect to the vertical, beyond which no direct light is emitted. DIRECT LIGHT: Light emitted from the lamp, off the reflector or reflector diffuser, or through the refractor or diffuser lens, of a luminaire. FIXTURE: The assembly that houses a lamp or lamps, and which may include a housing, a mounting bracket or pole socket, a lamp holder, a ballast, a reflector or mirror, and /or a refractor, lens, or diffuser lens. FULLY- SHIELDED LUMINAIRE: A lamp and fixture assembly designed with a cutoff angle of 90 °, so that no direct light is emitted above a horizontal plane. GLARE: Light emitted from a luminaire with an intensity great enough to produce annoyance, discomfort, or a reduction in a viewer's ability to see. HEIGHT OF LUMINAIRE: The vertical distance from the finished grade of the ground directly below to the lowest direct light emitting part of the luminaire. Adjourned Session —1998 Annual Town Meeting, coot....... April 1, 1998 INDIRECT LIGHT: Direct light that has been reflected off other surfaces not part of the luminaire. LAMP: The component of a luminaire that produces the actual light. LIGHT TRESPASS: The shining of direct light produced by a luminaire beyond the boundaries of the lot or parcel on which it is located. LUMEN: A measure of light energy generated by a light source. One foot candle is one lumen per square foot. For purposes of this By -Law, the lumen output shall be the initial lumen output of a lamp, as rated by the manufacturer. LUMINAIRE: A complete lighting system, including a lamp or lamps and a fixture.