REDWOOD CITY, Calif.--(BUSINESS WIRE)--Today, Silver Spring Networks, Inc. (NYSE: SSNI) announced that some of the largest utilities in the United States are expanding their networked street light deployments and initiating new street light and smart city projects with Silver Spring. Florida Power & Light (FPL), already working with Silver Spring on North America’s largest networked street light project under contract, expanded its program from 75,000 street lights to nearly 500,000 street