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Exterior Decorative
Lighting Guidelines
Following the success of Earth Hour 2009, the Exterior Decorative Lighting Guidelines were created to further improve the carbon footprint of Chicago area buildings. The guidelines also help protect bird migration patterns by reducing light pollution at the appropriate times.


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Exterior decorative lighting includes all non–emergency exterior lighting, including crown and façade lighting, lit signage, street level lighting and tree lighting.

Evening Guidelines:
  • Evening lights can power on no earlier than 30–minutes after official sunset.
  • Evening lights must power off no later than 10:00 PM Sunday through Thursday, and 11:00 PM on Friday and Saturday.

Lighting Schedule

*Grey cells indicate daylight savings time starts or ends mid–month


Morning Guidelines:
  • Due to dawn breaking before the beginning of rush–hour, morning exterior non–emergency lighting should be kept off.
  • Buildings with special circumstances may program exterior lighting to turn on no earlier than 5:00 AM and turn off no later than 30–minutes before official sunrise. Morning lights should remain off in May, June and July when dawn breaks at or before 5:00 AM.

Exception:

Evening lights on July 4 and December 31 may remain on until 1:00 AM.





View the List of Building Participants

Exterior Decorative Lighting
Guidelines Agreement Form:

Submit the form below and join the growing ranks of buildings and businesses who have volunteered to follow the new decorative lighting guidelines.

I Agree to Follow the New Lighting Guidelines:

Contact Name*
Building Name
Building Address*
Contact Phone*
Contact Email*
Is this a BOMA/Chicago Member Building?   Yes     No

If special circumstances require this building to use exterior decorative lighting during the morning hours, please state the reasons below:
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