By Amanda Vogt, Chicago Tribune Knight Ridder/Tribune Business News
Dec. 18--The holiday season's twinkling downtown light displays and homes festooned with festive decorations belie an emerging struggle for turf and money.
"We call it the Lighting Wars," said John Dregenburg of Northbrook-based Underwriters Laboratories, which tests the safety of lighting products.
Several years ago, Joe Peddle, an electrical contractor from Highland Park, unwittingly took a step toward joining the growing ranks of professional holiday decorators when he was