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Dark‑sky consultant recommends stricter shielding, spectrum and phase‑in rules for Lake Bluff lighting code
Summary
John Barentine of Dark Sky Consulting reviewed a second draft lighting ordinance, recommending fully shielded fixtures, color temperature limits, lumen caps, adaptive controls and a 10‑year amortization for nonconforming fixtures; committee discussed enforcement, public lighting exemptions, sports lighting guidance and a 4–7 year review cycle.
John Barentine, principal of Dark Sky Consulting LLC, presented a second review of a proposed Lake Bluff outdoor lighting ordinance on March 18 and recommended several revisions the committee could adopt to reduce light pollution while maintaining safety.
Barentine said the analysis used Dark Sky International principles and model guidance from the International Dark‑Sky Association and the Illuminating Engineering Society. He recommended that the village require fully shielded fixtures to prevent upward light, set a color temperature ceiling for general…
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