Maui County plans to replace its streetlights with more efficient LED lighting, following other counties in Hawaii, including Honolulu and Kauai.Maui Mayor Alan Arakawa, a speaker at this week’s Maui Energy Conference, said that at some point, the island will be heading in that direction. He also noted during his speech that the county, which includes the islands of Maui, Molokai and Lanai, is sticking to its ambitious goal of becoming the first islands in the United States to achieve 100 percent renewable energy.