Clockwork Home Services, Sarasota, Fla., recently announced that Mister Sparky America’s On-Time Electrician was ranked No. 160 among the nation’s top 300 franchise opportunities by, San Francisco, a subsidiary of Dun & Bradstreet, Short Hills, N.J. analyzed more than 700 franchise systems to compile its first list of AllBusiness AllStar Franchises. Criteria for the rankings were franchise unit growth rate, financial strength, system size, years in business, years franchising, availability of financing, and Web (brand) visibility.