DOE’s Connected Lighting Systems Efficiency Study — PoE Cable Energy Losses - Energy Watch News


DOE’s Connected Lighting Systems Efficiency Study — PoE Cable Energy Losses

Power over Ethernet (PoE) technology offers the ability to provide both low-voltage direct-current (DC) power and communication over a standard Ethernet cable—also referred to as a local area network (LAN) cable or Category cable. Light-emitting diode (LED) technology has reduced the power required for lighting applications, while advances in PoE standards and technology have yielded substantial increases in the amount of power that can be delivered to a networked device over a single cable. As a result, PoE technology is emerging in lighting and many other applications beyond its historical foothold in telephony and networking equipment. Several major LED luminaire manufacturers have introduced PoE connected lighting systems in recent years, making this a potentially disruptive technology. This report summarizes the results of an exploratory study investigating power losses in Ethernet cables used between PoE switches and luminaires in PoE connected lighting systems. The following recommendations, stemming from the study findings, are offered to help streamline the adoption of PoE technology in lighting applications: https://energy.gov/sites/prod/files/2018/01/f47/cls_poe-cable-pt1_nov2017_0.pdf

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