Dark Sky Ordinances

This Thursday marks the Winter Solstice, the longest night of the year. The Twin Cities will experience only about eight hours and forty-six minutes of daylight. After that point, sunlight will linger just a little longer each day, bringing spring and warmer weather with it (eventually).

All that darkness has us thinking about “dark sky” ordinances. These local regulations control and limit artificial light pollution within a community. Excessive and misdirected outdoor lighting has an array of adverse impacts. It not only disrupts wildlife behavior, but it also interferes with astronomical observations, and can have negative effects on human circadian rhythms, potentially contributing to sleep disorders. So, dark sky ordinances help to ensure that outdoor illumination is directed downward and shielded to prevent light spillage into the night sky.

Dark sky ordinances can also lead to energy efficiency and cost savings. By encouraging the use of energy-efficient lighting fixtures, communities can reduce their overall energy consumption, resulting in lower utility bills and a smaller carbon footprint. This aligns with broader sustainability goals and promotes responsible urban development.

Flagstaff, Arizona was one of the first cities to enact dark sky ordinances. The City's commitment to preserving its dark skies has made it a model for other communities seeking to address light pollution. Since then, dozens of cities have implemented similar regulations, such as Sedona (AZ),  Groveland (FL), and Blanco (TX).

Successful implementation of dark sky ordinances often involves community awareness and education campaigns. By informing residents, businesses, and local authorities about the importance of reducing light pollution, communities can garner support for the regulations and foster a sense of shared responsibility for preserving the night sky.

Curious about dark sky policies and ordinances? You can explore more here.