Energy-smart retrofitting

Gary Neptune knows a good deal when he sees one, and he’s seeing one every month when he looks at his utility bill.

Neptune owns Neptune Mountaineering in Boulder. Since its opening in 1973, Neptune’s store has become known for its wide range of climbing and ski gear, as well as the vintage gear he collects.

None of his customers likely understands how much Neptune is saving on electricity since his landlord, W.W. Reynolds Cos., upgraded his shopping center’s lighting system, but it is the kind of money that will help the lights stay on for a long time.

“We’re saving about 25…