A transformer explosion in Queens sent an eerie blue light flooding the nighttime sky over New York City Thursday night, startling residents. Con Edison says a couple of transformers tripped offline at the substation at 20th Avenue and 32nd Street, sparking a fire. The explosion lit the sky so brightly that it briefly appeared to be daytime in neighborhoods like Astoria and Woodside, residents reported. Smoke arose from the source of the blue light, visible from as far as Manhattan.