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Memo: Clarifications to the NLC 2020 Report – 2025 update

William Attardi on February 22, 2025

 “Energy Savings from Networked Lighting Control (NLC) Systems With and Without LLLC”  Key updates include refined clarification of the definition of luminaire-level lighting controls (LLLC) used in the report, elaborated explanations on several important aspects of the control savings factors (CSFs), and distinguishing the calculation methodology between high-end trim savings and other control strategies (occupancy sensing and daylight harvesting). The memo emphasizes that the documented CSFs reflect average savings across a diverse set of projects, where optimal programming varied, and highlights considerations for small sample bias in evaluations. Building-specific CSFs and their limitations are explained, and the memo differentiates findings from a related redesign study to avoid misinterpretation. Lastly, an updated executive summary and errata sheet correct clerical errors, reaffirming that NLC systems with LLLC offer higher energy savings potential but encouraging ongoing updates as technology and datasets evolve.

TRAINING: How to Design a Lighting Control System by C. Webster Marsh and Craig DiLouie

William Attardi on December 31, 2024

Based on EE105: Lighting Control System Design, a new course in the Lighting Controls Association’s Education Express program provides detailed information about designing an effective lighting control solution. In Part 1 of this Lighting Controls System Design series, we learned about key documentation including the Content Intent Narrative (CIN), Sequence of Operations (SOO), and Owner Project Requirements (OPR). The next step in design development in Part 2, is to turn these requirements and conceptual design into a realized design. In Part 3 of this series on how to design a lighting control system, we will discuss installation and post-occupancy. You will learn about bidding, responding to questions from installers, reviewing submittals and defending your design, following-through with the installation of the equipment, functional testing, training essential staff, and ultimately ensuring the owner is satisfied. How to Design a Lighting Control System

Key Themes of Washington’s Farewell Address 

Crafted with the assistance of his close advisors, including Alexander Hamilton and James Madison, President George Washington’s Farewell Address was intended to offer guidance and warnings to the American people as they faced the challenges of the future. Among the most significant themes were:

  1. Neutrality in Foreign Affairs – advising that the United States should avoid becoming involved in the conflicts and political machinations of foreign powers. He argued that such alliances could lead to unnecessary entanglements and could jeopardize American interests and independence.
  2. The Dangers of Political Parties – Washington expressed concern that political factions could lead to divisions within the country and weaken the unity of the nation. He believed that political parties could become sources of discord and could prioritize their own interests over the common good. He encouraged Americans to work together for the benefit of the nation as a whole.
  3. The Importance of National Unity – He emphasized that the strength of the United States depended on the unity of its people and the coherence of its government. Washington urged Americans to set aside regional and political differences and to work together to build a strong and prosperous nation. Source: Day in History