Dobbins JLUS IMP Public Draft Light Pollution Study | Page 261

MODEL LIGHTING ORDINANCE - USER’S GUIDE
MODEL LIGHTING ORDINANCE - TEXT
V. RESIDENTIAL LIGHTING - Ordinance Text
V. RESIDENTIAL LIGHTING - User’s Guide
This section applies to single family home, duplexes, row houses, and
low rise multi-family buildings of 6 dwelling units or less.
RESIDENTIAL LIGHTING EXCEPTIONS
The exceptions allow for typical lighting that might exceed the specified
limits.
Landscape Lighting - While not common in residential areas, it can
cause light pollution and light trespass if it is not controlled.
Lighting controlled by Vacancy (Motion) Sensor - Reduces light pollution
and light trespass and should be encouraged.
RESIDENTIAL LIGHTING EXAMPLE
In this example on the following page, five different luminaires are used on
a residential property. Each luminaire must comply to meet the requirements.
The site plan following shows luminaire types followed by a tabulation of each
uminaire, whether or not it is fully shielded, lamp type, and initial luminaire
lumens. If the luminaire lumens are not known, multiply the initial lamp
lumens by the luminaire efficiency. If the efficiency is not known, multiply the
initial lamp lumens by 0.7 as a reasonable assumption. The maximum
allowable lumen values come from Table G, based on the shielding
classification and location on the site. In this case, each luminaire complies
with the requirements of Table G.
Comparison of efficacy by power
(120 Volt Incandescent lamps)
Output
Power (Watt)
(Lumens) Incan CFL
LED
500 40 8 - 10
9
850 60 13 - 18 12 - 15
1,200 75 18 - 22 15
1,700 100 23 - 28 18
USER’S GUIDE - Page 19
Appendix B: Model Lighting Ordianance
A. General Requirements
For residential properties including multiple residential properties
not having common areas, all outdoor luminaires shall be fully
shielded and shall not exceed the allowed lumen output in Table G,
row 2.
Exceptions
1. One partly shielded or unshielded luminaire at the main
entry, not exceeding the allowed lumen output in Table G row
1.
2. Any other partly shielded or unshielded luminaires not
exceeding the allowed lumen output in Table G row 3.
3. Low voltage landscape lighting aimed away from adjacent
properties and not exceeding the allowed lumen output in Table
G row 4.
4. Shielded directional flood lighting aimed so that direct glare is
not visible from adjacent properties and not exceeding the
allowed lumen output in Table G row 5.
5. Open flame gas lamps.
6. Lighting installed with a vacancy sensor, where the sensor
extinguishes the lights no more than 15 minutes after the
area is vacated.
7. Lighting exempt per Section III (B.).
B. Requirements for Residential Landscape Lighting
1.Shall comply with Table G.
2.Shall not be aimed onto adjacent properties.
ORDINANCE TEXT - Page 19
Page B-19