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Power over Ethernet (PoE) is a technology enabling electric power and data to be sent to and from multiple devices over an Ethernet cable. PoE is not a new technology per se — Since 2003, it has been used in devices, such as cameras and phones. In 2018, however, the technology advanced to allow for a more substantial wattage load (90W), making it an increasingly appealing and beneficial option for entire building systems, including lighting. Through its capacity to connect devices and systems within one centralized and easy-to-monitor network, the new and improved PoE can play a key role in the design and construction of smart buildings.