DARK SKY ACT

Summary

Starting Dec. 1, 2026, any new or renovated outdoor lighting bought or rented with Illinois state funds, or installed on state‑owned or managed land, must meet the responsible outdoor lighting requirements of the Dark Sky Act. Agencies can request exemptions, and the Department of Central Management Services must decide within 30 days. The change updates the law’s title, adds technical definitions, and takes effect immediately.

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