Even if no one's working late, your building may still be burning the midnight oil - literally. Overlit exteriors and lights that are left on could be driving up your lighting-related energy consumption overnight, when little to no illumination is needed. "Light is wasted any time a person doesn't need it, either because the space is unoccupied or because more electric lighting is being provided than is needed," explains Jeremy Snyder, Director of Energy Programs at Rensselaer Polytechnic Institute's Lighting Research Center. "There are many opportunities to reduce wasted light. Paying attention to these opportunities can result in cost savings."
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