Retail, Shopping Mall Fire at mall sporting goods store contained by sprinkler system (Watertown, NY) June 11, 2012 viking210 The fire was caused when a ceiling light overheated, causing the contents of the ballast to leak into the light fixtures and create sparks that ignited a rack of clothing below it, Chief Dillon said. Fortunately, the sprinkler system effectively contained the blaze until firefighters could extinguish it, he said. “It did what it was supposed to do,” Chief Dillon said.