Peter Staye, associate director of utilities, points to the ceiling of the Bacon Field House. About 140 high-tech light fixtures span the width of the dome-roofed gymnasium. "These are special lights for high ceilings," he says. "There's 24 fewer fixtures here than there used to be, and it's just as bright. If we used florescent fixtures, we'd need 240 of them." The new, 350-watt, high-intensity discharge bulbs have replaced the older, 400-watt bulbs, and use 373,000 fewer kilowatt hours per year. They're also programmed to turn on in zones, and change luminosity throughout the day based on a newly-installed ambient…