Outdoor lighting in Illinois must meet specific standards to minimize light pollution and preserve historical integrity.

The Illinois bill SB3964 amends the Responsible Outdoor Lighting Control Act to regulate outdoor lighting standards. It mandates that new luminaires installed after June 30, 2032, have a color temperature of 2,700 Kelvin or lower. Exceptions include temporary holiday lighting, certain state-managed properties, and areas requiring uplighting for safety or security reasons. The bill also restricts light trespass onto designated natural areas and mandates that uplighting for statuary and historical facades be minimized and extinguished by 12:00 a.m.

Outdoor lighting in Illinois must meet specific standards to minimize light pollution and preserve historical integrity.

The Illinois bill SB3964 amends the Responsible Outdoor Lighting Control Act to regulate outdoor lighting standards. It mandates that new luminaires installed after June 30, 2032, have a color temperature of 2,700 Kelvin or lower. Exceptions include temporary holiday lighting, certain state-managed properties, and areas requiring uplighting for safety or security reasons. The bill also restricts light trespass onto designated natural areas and mandates that uplighting for statuary and historical facades be minimized and extinguished by 12:00 a.m.