Berwyn, IL Outdoor Lighting: Dark Sky Rules (2026)

Berwyn Code of Ordinances § 1250.08 states that its purpose includes minimizing light pollution, and its fixture standard is the core of that goal. Under subsection (C)(4), all new and replacement outdoor lighting shall employ full cut-off or fully shielded fixtures. The section applies to new or replacement outdoor lighting, with an exception for unshielded lighting for holiday decorations or permitted temporary uses under § 1244.05 (Temporary Structures and Uses).

Building facade illumination has its own rule in subsection (C)(5). It is limited to fully shielded fixtures directed towards the facade, and all light from those fixtures must be concentrated on the exterior wall surface of the building being illuminated. Spill above the roofline or past the wall does not satisfy that test.

Height limits in subsection (D)(2) keep fixtures low. For non-residential uses, light poles and building-mounted fixtures cannot exceed 16 feet. Light poles for educational facilities or outdoor recreational facilities can reach 60 feet, and outdoor lighting for all outdoor recreation areas is subject to site plan review. For residential uses, light poles cannot exceed eight feet and building-mounted fixtures, including under-soffit lighting, cannot exceed 15 feet. The Building Code can require a different height.

Other controls round out the section. Non-residential properties need a photometric plan prepared by a licensed professional and approved by the Zoning Administrator before installation. Their lighting must be on a photo sensor, occupancy sensor or timer that extinguishes lights no more than one hour after the close of business, excluding security lighting. Flashing, strobe and laser lights are prohibited. LED technology is encouraged, not required.