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.
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