Thanks to a Pullman resident for sending us this one.
[Available from: http://www.pullman-wa.gov/DrawOnePage.aspx?PageID=46]
The code states that lights shall not create glare on adjacent properties and establishes an maximum level of light trespass (0.5 fc). This code does not address the issue of sky glow.
CITY OF PULLMAN ZONING CODES
EXCEPTIONS AND SPECIAL PROVISIONS PERTAINING TO USES,
REGULATIONS, AND PERFORMANCE STANDARDS
17.35.090 Light and Glare.
(1) All sources of illumination shall be directed and, when necessary,
shielded so as not to produce directed glare on adjacent properties.
(2) No industrial or commercial use shall cause a level of illumination
exceeding 0.5 footcandles in a contiguous or adjacent residential district.
Light intensity shall be measured using the procedures established by the
Illuminating Engineering Society in the current IES Lighting Handbook.
(3) No source of intense light or glare, such as arc welding shall be visible
from any point beyond the property line of the use generating that light or
glare. Construction welding is exempt from this standard. (Ord. No. 87-9 §1, 1987).