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Old 08-12-2006, 03:14 PM
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drh4683 drh4683 is offline
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Join Date: Jan 2003
Location: Chicago, IL
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Bulbs on the sign and cost to operate

Here's some useless trivia for you:

Perhaps some of you have wondered how much energy is used to illuminate this sign due to the flood bulbs on it. Here you go, I took a count and come up with roughly 609 flood bulbs per side (+/- 10 bulbs) that counts to 1218 total. Lets assume each flood is 150 watt, that means this sign would consume a total of 182700 watts, or 182.7 kW. ComEd charges $.09 per kilowatt hour (kWh). To operate this sign, not including the flourecent bulbs that light up the slogan, it would cost $16.44 per hour. I remember that sign being on all day long. So, for 24 hours it would cost $394.56 per day which counts to $11836.80 in a month of 30 days. Remember, this would be 2006 prices! energy cost in 1998 were about $.07/kWh when this sign was last on. So when the sign was last on, it was costing Zenith $12.79 per hour.

Last edited by drh4683; 08-13-2006 at 05:52 PM.
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