How many lightbulbs?

This is a totally random question, but I’ve been unable to find an answer through any research I have done (which I can’t lie, hasn’t been much). Does anyone out there know (on average) how many lightbulbs are in the city of Chicago? Any variance of the answer will do (e.g. street lights only, commercial buildings only, etc). It was a question that popped into my head one day and a random fact I’d like to know.

I have no idea, but Chicago DPW might be able to give you a guesstimate.

Including holiday lights in the count, and within the city limits, 483,861,846. This does not include LED lights used for indication only. Peak useage at about 17% of the total is just before Christmas, the low end at about 5% generally happens in early July. .0003% are currently burned out and inoperative, 7% have not been illuminated in the past year and .0004% are on all the time. The residents of Chicago could save about $800,000 a day in energy costs if all incandesent bulbs were replace with flourescent lighting. On the flip side, the city of Chicago would incur an additional cost of about $35,000,000 a year disposing of all the burned flourescent bulbs and 12,538 children will miss the opportunity to make paper mache’ macaras.

97.5603% of statistics are made up on the spot.

It’s actually 96.248%