Connected Lighting Systems Efficiency Study: PoE Cable Energy Losses, Part 2

Abstract

The U.S. Department of Energy's Solid-State Lighting (SSL) program documents the performance of SSL products and systems based on standardized laboratory test results, additional specialized testing, mock-up studies, and real-world field evaluations. This information is provided publicly for several purposes: 1) to track SSL technology performance improvement over time; 2) to identify technology challenges that impact performance and application of SSL; 3) to spur continued advancements in SSL technology, product design, and application; and 4) to maximize energy efficiency and decrease U.S. energy use, while improving lighting quality. DOE does not endorse any commercial product or in any way provide assurance that other users will achieve similar results through use of these products. SSL technology continues to evolve quickly, so evaluation results should always be understood in the context of the timeframe in which products were acquired, tested, installed, and operated. Especially given the rapid development cycle for SSL products, specifiers and purchasers should always seek current information from manufacturers when evaluating such products.

Verification of a Modeling Toolkit for the Design of Building Electrical Distribution Systems

“…AC cable losses were assumed to have negligible impact on AC LED driver performance and output. However, based on previous experience, the same assumption did not apply to DC cable losses and DC LED drivers [27,28]. To measure the Ethernet cable losses at different PoE load levels, the programmable PD was connected in place of the PoE luminaires and load levels were set according to the lighting schedule.…”