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Light bulbs turned off by volunteers through Sept. 29, 2023

Approximate tons of carbon dioxide equivalent saved through Sept. 29, 2023

Approximate dollars saved in energy bills through Sept. 29, 2023

Not in use? Turn off the juice!

iSEE’s Illini Lights Out (ILO) program demonstrates the immense energy-saving impact of simply turning off the lights when you leave a classroom, lab, or study space. On a few Friday nights each month, volunteers gather to form mini lights-out brigades and tour campus buildings recording how many lights are left on (and shutting off as many as they can, of course). Volunteering takes about an hour and a half, and there are always snacks afterward! Thanks to a grant from the Student Sustainability Committee (SSC), ILO has multiple events you can take part in each semester!

2023-24 Dates!

iSEE is hosting five events in Fall 2023:

  • Sept. 15 — 94 volunteers turned off 2,443 bulbs in 20 buildings, saving as much as 4,214 kWh and $371 over the weekend, and averting as much as 2.9 tons of greenhouse gas emissions!
  • Sept. 29 — Thanks to the 180 volunteers who turned off 6,059 bulbs in 37 buildings, saving as much as 10,452 kWH and $922, and averting as much as 7.4 tons of GHG!
  • Oct. 13
  • Nov. 3
  • Dec. 1
  • Spring 2024 dates coming soon!

2022-23 wrap-up

Thanks to the fantastic work of more than 1,450 student volunteers, who turned off 42,574 bulbs, saving as much as 73,000 kWh and $6,400, and averting 47 tons of GHG, at our 10 dates!

About ILO

Illini Lights Out began as a one-off event organized by iSEE’s Energy Conservation and Building Standards SWATeam in Spring 2016 — at which students managed to turn out 1,500 lights in just 40 minutes — and expanded to a monthly happening during 2016-17 with the support of a grant from the Student Sustainability Committee (SSC).

Read more about the 2016-17 Illini Lights Out efforts.

Interested in a Lights Out event at your University? Email us at for tips and tricks on how to get started.


Contact Us


Office phone: 217-333-4178