MILFORD Conn. The Subway sandwich chain said it would replace one regular incandescent light bulb with an energy-saving compact fluorescent bulb in each of its more than 22,000 stores as part of Energy Star’s Change a Light, Change the World program. Subway said the light bulb replacement, which begins Oct. 1, would reduce the chain’s annual energy consumption by an estimated 1.9 million kilowatt-hours. The Milford-based franchisor said the energy savings was equivalent to preventing ...

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