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" ... Switching to LED lighting provides a substantial savings opportunity in existing buildings. In the case of Liberty Tower, the new lighting system is expected to use 60% less energy than the system it’s replacing. However, more savings are possible in LED retrofits through the addition of controls. Because LEDs provide better dimmability than fluorescent lights, they are better suited to controls. Even though the reduced energy consumption of LEDs reduces the amount of energy available to be saved, controls can allow an additional way of fine-tuning the amount of energy being used, thus providing more savings. ... "