Dobbins JLUS IMP Public Draft Light Pollution Study | Page 295

Pattern Outdoor Lighting Code
Standard ver. 2.0
Pattern Outdoor Lighting Code
canopy margins or building faces), shall be considered Class 3 lighting
(decorative), and shall be subject to the standards applicable for such
lighting, including but not limited to the lamp source, shielding standards
and total outdoor light output limits of Section 4.2.
5.3 Multicolor Changeable-Copy LED Sign Lighting Standards. Lighting for
multicolor changeable-copy LED signs (Figure 5.3.A) must meet the
following:
A. [ALTERNATIVE A] Multicolor changeable-copy LED signs are not
permitted.
[ALTERNATIVE B] Multicolor changeable-copy LED signs must be
adjusted to prevent overly bright luminance at night: automatic controls
must limit night luminance to a maximum of 100 nits when the display is
set to show maximum brightness white (100% full white mode). The
applicant shall provide a written certification from the sign manufacturer
that the nighttime light intensity has been factory pre-set not to exceed this
level, and that this setting is protected from end-user modification by
password-protected software or other method as deemed appropriate by
the Planning Director.
Multicolor Changeable-Copy LED
Standard ver. 2.0
Table 5.4. ILLUMINATED SIGN TIME LIMITS
Sign Type
Lighting Zone
LZ 1 LZ 2
Internally illuminated, light background 6pm 8pm
Multicolor Changeable-Copy LED 6pm 8pm
All other types 9pm 10pm
Section 6: Special Use Lighting Standards.
6.1 Recreational Facilities.
A. Class of Play: Fields designed primarily for use by municipal or amateur
leagues, training, recreational or social levels, shall be considered Sports
Class IV as defined by the Illuminating Engineering Society of North
America (IESNA). Fields designed primarily for college, semiprofessional,
professional or national levels shall be considered Sports Class I, Sports
Class II or Sports Class III as defined by IESNA.
B. Lighting Class and Amount: Lighting for outdoor athletic fields, courts or
tracks shall be considered Class 1 lighting (Color Rendition), and shall be
exempt from the lumens per acre limits of Section 4.2. Illuminance shall
be designed to achieve no greater than the minimal levels for the activity as
recommended by the Illuminating Engineering Society of North America
(IESNA) for the Sports Class as described in Section 6.1.A.
C. Shielding:
1. Facilities designed for Sports Class III and Sports Class IV: lighting for
the field shall use fully shielded lighting fixtures. Where fully
shielded fixtures are not available, lighting fixtures using external
louvers or shields that, in the final installed configuration, extend to within
3 inches on the lowest portion of the light fixture opening are required
(Figure 6.1.C.1). The fixtures shall be installed and maintained with
aiming angles that permit no greater than 1% of the light emitted by each
fixture to project above the horizontal.
Figure 5.3.A. Multicolor changeable-copy LED sign
5.4 Time Limits. Illumination for all on-site advertising signs except billboards,
shall be turned off by the times listed in Table 5.4 or when the business
closes, whichever is later. Signs subject to time limits are required to have
functioning and properly adjusted automatic shut-off timers. Light background
(white, off-white, light gray, cream or yellow) internally illuminated signs,
installed legally before enactment of this code [enter date], may continue to
be used and illuminated but must conform to the time limits as indicated.
Appendix C: Pattern Outdoor Lighting Guide
13
Page C-7
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