The leaders of Eastern Maine Healthcare Systems want their facilities seen in a new light — a northern light, if you will. EMHS announced Monday that it will be changing its name as well as the names of 20 of its facilities around the state next month to promote the improved continuity of care that they offer, said Jonathan Hutter, Eastern Maine Healthcare System’s director of brand and marketing. At its simplest, EMHS starting next month will become Northern Light Health, and add the term “Northern Light” to many of its facilities.