The White Mountains Regional School District will save $20,000 on annual energy costs. A group of students, the Society of Sustainable Spartans, are to thank. SOSS replaced the high school’s 56-year-old lighting system with energy-efficient lighting, converting 1,200 fixtures from fluorescent to LED. It will cut the high school’s energy consumption by 92,000 kilowatt hours per year (a $13,000 annual savings) and eliminates the need to replace 700 fluorescent bulbs over the course of a school year (a $7,000 annual savings). The students were recognized by U.S. Rep. Ann Kuster during a visit on Thursday. Kuster called SOSS a success story for other school districts to follow. “You are genuinely leading the way,” Kuster said.