Dobbins JLUS IMP Public Draft Light Pollution Study | Page 120

Any structural part of the light fixture providing this shielding must be permanently affixed
and part of the fixture, not part of any surrounding building or architectural elements.
16.19. L ight Trespass. Light falling across property boundaries, on property not containing the
originating light source.
16.20. Lighting Zones. The three lighting zones are defined on the Lighting Zone Map, by
this reference made a part of this Code. Guidelines used to guide the delineation of the
lighting zones are:



A. Lighting Zone LZ 1. This Zone includes rural areas, undeveloped or primarily
residential, with typically small commercial centers surrounded by low density residential
uses or open space.





B. Lighting Zone LZ 2. This Zone includes predominantly suburban residential areas,
including neighborhood commercial or industrial areas mostly surrounded by residential
areas.

Figure 16.14a. Examples of fully shielded fixtures.

C. Lighting Zone LZ 3. This Zone includes urban areas with primary land uses for
commercial, business and industrial activity, including multi-family residential areas mostly
surrounded by commercial areas.
16.21. Lumen. Unit of luminous flux; used to measure the amount of light emitted by lamps.




16.22. Luminaire. A complete lighting assembly (including the lamp, housing, reflectors, lenses
and shields), less the support assembly (pole or mounting bracket); a light fixture . Includes
luminous tubes , lamps or similar devices, permanently installed or portable, used for
illumination, decoration, or advertisement. Such devices shall include, but are not limited
to lights used for:





A. parking lot or parking garage lighting;
B. roadway and driveway lighting;
C. pedestrian or walkway lighting;
D. entryway lighting;
E. buildings and structures;
F. recreational areas;
G. landscape lighting;
H. billboard s and other signs (advertising or other);
I. product display area lighting;
J. building or structure decoration;
K. building overhangs and open canopies.



Figure 16.14b. Examples of fixtures that are NOT f ully shielded (*even though the lamp in
these fixtures is shielded from direct view when viewed from the side or above, reflective
surfaces and/or lens covers are directly visible from the side).
16.15. Illuminance. The amount of light falling onto a unit area of surface (luminous flux per
unit area) - measured in footcandles or lux.
16.16. Installed. The attachment, or assembly fixed in place, whether or not connected to a
power source, of any outdoor light fixture .
16.17. LED. Light emitting diode.
For purposes of determining total outdoor light output from a luminaire (see Table 4.1),
lighting assemblies which include multiple lamps within a single luminaire or on a single
pole or standard shall be considered as a single unit (Figure 16.22).

16.18. Light Fixture. See Luminaire .
Page A- 52
Appendix A:
White Paper – Communities Addressing Light Pollution that Affect Nighttime Military Training