Since 1924, the lights illuminating the white face of the Wrigley Building have almost continually shone.  Now, the building’s owners, entrepreneur Brad Keywell and fellow Groupon co-founder Eric Lefkofsky  want to shift the spotlight onto the tech companies they see as emblems of the future.

http://bluesky.chicagotribune.com/originals/chi-wrigley-building-tech-companies-bsi,0,0.story