Dobbins JLUS IMP Public Draft Light Pollution Study | Page 277

MODEL LIGHTING ORDINANCE - USER’S GUIDE MODEL LIGHTING ORDINANCE - TEXT X. DEFINITIONS - Ordinance Text Examples of Fully Shielded Luminaires Emergency conditions Footcandle Forward Light Fully Shielded Luminaire Glare Hardscape Hardscape Area USER’S GUIDE - Page 35 Appendix B: Model Lighting Ordianance Generally, lighting that is only energized dur- ing an emergency ; lighting fed from a backup power source; or lighting for illuminating the path of egress solely during a fire or other emergency situation; or, lighting for security purposes used solely during an alarm. The unit of measure expressing the quantity oflight received on a surface. One footcandle is the illuminance produced by a candle on a surface one foot square from a distance of one foot. For an exterior luminaire, lumens emitted in the quarter sphere below horizontal and in the direction of the intended orientation of the luminaire. A luminaire constructed and installed in such a manner that all light emitted by the lumin- aire, either directly from the lamp or a diffus- ing element, or indirectly by reflection or re- fraction from any part of the luminaire, is pro- jected below the horizontal plane through the luminaire's lowest light-emitting part. Lighting entering the eye directly from lumin- aires or indirectly from reflective surfaces that causes visual discomfort or reduced visibility. Permanent hardscape improvements to the site including parking lots, drives, entrances, curbs, ramps, stairs, steps, medians, walkways and non-vegetated landscaping that is 10 feet or less in width. Materials may include concrete, asphalt, stone, gravel, etc. The area measured in square feet of all hard- scape. It is used to calculate the Total Site Lumen Limit in both the Prescriptive Method and Performance Methods. Refer to Hardscape definition. ORDINANCE TEXT - Page 35 Page B-35