Sign-illumination limits dominate dark-sky certification discussion

Staff reviewed the dark-sky certification checklist and identified several sticking points in the city's Unified Development Code that may prevent certification without modification or alternative measures.

A central point of contention was proposed language that would require illuminated signs to be extinguished when the associated activity is not taking place. "Signs may only be illuminated while the associated activity is taking place," staff read from the suggested restrictions, noting council had previously removed that language from the UDC after objections.

Commissioners discussed possible compromises, including dimming requirements (existing ordinance language on dimming to 100 nits after hours) and grandfathering existing signs that represent capital investments. Vice Chair Hendrickson noted the difficulty of retrofitting older signs and urged the commission to balance dark-sky goals with fairness to businesses; another commissioner raised constitutional concerns about limiting commercial expression.

Staff said it will consult with the dark-sky community about alternative approaches that could meet certification intent without imposing onerous retrofits, then report back with recommended language.