Here is an interesting article from the US Dept of Energy that is targeted at single family home owners, but much of it applies to multi-family housing as well: “An average household dedicates about 10% of its energy budget to lighting. Switching to energy-efficient lighting is one of the fastest ways to cut your energy bills. Timers and motion sensors save you even more money by reducing the amount of time lights are on but not being used….” Read More

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