Glenwood Springs adopts exterior lighting and signage changes to reduce light pollution

The Glenwood Springs City Council unanimously adopted an ordinance on April 16 that updates municipal rules for exterior lighting and illuminated signage to reduce light pollution and align more closely with Dark Sky International principles.

Emily Ellington, community development staff, explained three primary changes: require outdoor fixtures to use 3,000 Kelvin or lower color-temperature lighting, reduce maximum canopy illumination (staff recommended a canopy maximum of 20 foot‑candles rather than the current higher limit), and institute a citywide illuminated-sign curfew that would require existing illuminated signs to comply by January 1, 2032 (new signs would follow the regulations immediately). Ellington said the changes are modest, intended to improve night‑time character and energy efficiency, and are consistent with the city’s comprehensive plan and energy/climate action goals.

Councilors noted the proposals are incremental steps and that broad retrofits would occur over time through redevelopment triggers; Planning & Zoning recommended that illuminated signs be brought into compliance over a multi-year period. The motion to approve Ordinance 2026-08 passed 7-0.