Learners Live

Did you Know?
Menu

Decoding California’s Title 24, Part 6

William Attardi on August 26, 2025

Commercial building energy codes regulate the design of nonresidential buildings to minimize energy consumption. While the majority of U.S. states adopt model codes and standards, the State of California developed its own code: Title 24, Part 6 of the state’s Building Standards Code. The latest version was released in 2025 and will take effect January 1, 2026. Title 24, Part 6 covers residential, nonresidential, high-rise residential, and hotel/motel buildings. Title 24, Part 6 contains robust, detailed lighting and control requirements. It requires a broad range of controls to ensure general lighting is turned Off or reduced when not needed.  .  For lighting, a number of changes have been made, mostly adjustments and clarifications. Decoding California’s Title 24, Part 6

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

Happy St. Patrick’s Day—whether you’re going fact or legend, it’s a great excuse to celebrate!

St. Patrick is a mix of solid historical fact and popular myth/legend that grew over centuries. He was a real historical figure—a British-born missionary (likely from what is now Scotland or northern England/Wales area) who lived in the 5th century (roughly 385–461 AD). His birth name was probably Maewyn Succat, and he became known as Patricius (Patrick) later. He wrote two surviving documents: his Confessio (Confession) and a letter to Coroticus, which are the main primary sources about his life. These confirm he was kidnapped by Irish raiders as a teenager, enslaved in Ireland for about six years (herding sheep), escaped, trained for the church, and returned as a missionary bishop to convert the Irish to Christianity. He wasn’t the first Christian in Ireland—some communities already existed—but he’s credited with major missionary work and is the patron saint of Ireland.

Many beloved St. Patrick’s Day traditions and stories are myths or later embellishments: Myth: He drove the snakes out of Ireland. Completely legendary. Ireland has had no native snakes since the last Ice Age (about 10,000+ years ago)—the post-glacial island was isolated, and snakes never recolonized it. The “snakes” story symbolizes driving out paganism or “evil”  but it’s not historical. Myth: He used the shamrock to explain the Holy Trinity. This is a charming story, but it doesn’t show up in Patrick’s own writings or early biographies. While the shamrock (a three-leaf clover) became a symbol of Ireland and St. Patrick’s Day, the Trinity analogy is probably a later invention. Myth: St. Patrick was Irish by birth. No—he was Romano-British, captured and brought to Ireland against his will. Other common myths: Green wasn’t always the color associated with him or the holiday; massive parades and “wearing of the green” became big in America first; he didn’t drink green beer or eat corned beef and cabbage, those are more modern Irish-American traditions. In short: The man himself is fact—a brave, devout missionary who helped spread Christianity in Ireland. But many of the fun, magical tales attached to him are myths.

ni