§ 31-01-040. Light pollution; general requirements.

(a)

Only shielded outdoor light fixtures may be installed for security purposes or for illumination of commercial establishments.

(b)

Shielded, low-pressure sodium outdoor light fixtures or high pressure sodium lighting equipped with a minimum ninety degree side cut off internal louver may be installed to provide illumination for public streets or for any purpose other than that specifically listed in subsection 31-01-040(a). However, in the case of the replacement of light fixtures installed to provide illumination for public streets, low-pressure sodium outdoor light fixtures or high pressure sodium lighting equipped with a minimum 45-degree side cut off internal louver shall only be required if existing circuitry will allow the replacement of an individual light fixture with a low-pressure sodium light fixture or high pressure sodium lighting equipped with a minimum 45-degree side cut off internal louver.

(c)

All outdoor light fixtures maintained on public or private property, whether installed before or after the effective date of this chapter, shall be turned off between 11:00 p.m. and sunrise except when used for:

(1)

Commercial and industrial uses (such as sales, assembly and repair areas) where business is conducted after 11:00 p.m. but only for so long as such use continues;

(2)

Illuminated advertising signs on the premises of a business while it is open to the public;

(3)

Lighting necessary for security purposes or to illuminate walkways, roadways, equipment yards and parking lots; or

(4)

Recreational use that continues after 11:00 p.m. but only for so long as such use continues.

(d)

The operation of searchlights for advertising or commercial purposes is prohibited.

(Ord. No. 805, § 1, 12-11-90; Ord. No. 1030, 4-14-98; Ord. No. 1057, 4-13-99)