Every year La Crosse puts on the Rotary Festival of Lights in Riverside Park, with the number of lights growing each year. This year it featured over 2.6 million lights. See video below.
http://www.wkbt.com/Global/story.asp?S=11569809 Here is a video from 2007, but as I said, the number of lights has grown significantly since then:
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Here is a video of the north side of the park, featuring the synchronized music-light display from this year.
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Another video from this year:
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From last year:
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From 2006:
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None of the videos do this display any justice. You must see it for yourself. I am a Grinch and even I like the display. Admission is free but they accept donations of food or cash.