TM-21-21, Projecting Long-Term Luminous, Photon, and Radiant Flux Maintenance of LED Light Sources

IES Logo

March 2, 2022

In 2011, The IES published TM-21 “Projecting Long Term Lumen Maintenance of LED Light Sources.”  This method was quickly adopted globally for projecting lumen maintenance of Solid-State Lighting sources.  In 2021 the IES Test Procedures Committee (TPC) revised this document to expand its scope in terms of the types of flux maintenance and also to include interpolation between different drive currents. 

With the publication of ANSI/IES TM-21-21, the IES will also be launching a web-based calculation tool for projecting flux maintenance.  Join us for this educational session on TM-21 to learn about the revisions and reasons behind the revisions as well as an introduction to the web-based calculation tool.  

Speaker:Eric Bretschneider

Go HERE to register

Related Articles

Review of 2022 Annual Reports: International Dark Sky Places Program Advocacy

Review of 2022 Annual Reports: International Dark Sky Places Program Advocacy

November 8, 2023 An International Dark Sky Place aims to encourage communities and protected areas to become environmental leaders by communicating the importance of dark skies to the public and providing an example of what is possible with proper stewardship. Depending on the location, resources, experience, and knowledge of staff and volunteers, International Dark Sky…

“To Light, or Not to Light?”: Developing Lighting Concepts with Deborah Gottesman

“To Light, or Not to Light?”: Developing Lighting Concepts with Deborah Gottesman

October 19, 2023 Event run by IES Calgary Lighting layouts are not the same as lighting design. Quality lighting design begins with concept development – a form of programming for the visual environment that considers many elements such as perception, contrast, and visibility. This seminar outlines the steps taken on various diverse projects to address…

Technical Luncheon 2024: Lighting Design in the Outdoors & Minimization of Environmental Impacts with IES Toronto

Technical Luncheon 2024: Lighting Design in the Outdoors & Minimization of Environmental Impacts with IES Toronto

February 5, 2024 February 21 12:00- 1:00 PM EST The Psychology Behind Pedestrian Enjoyment at Night Through Illumination Design Good News! We have lighting standards that help prevent motorists from killing pedestrians. But do you know how to design with light to create beautiful outdoor spaces people enjoy? This presentation will delve into the intricate…

Lighting Control: To Infinity and Beyond from Vancouver IES

Lighting Control: To Infinity and Beyond from Vancouver IES

October 19, 2023 Despite the growth and improvements of lighting controls, designers and contractors frequently associate them with necessary evils, and do the bare minimum to meet code. Why? Because they can be expensive, complicated to design, install, and program if done incorrectly.   During this presentation we will discuss the latest in lighting controls,…

Changing Scene

  • Luminis Wins Two 2024 Product Innovation Awards

    Luminis is pleased to announce its Syrios Pro family and Jaki luminaires have each received a 2024 Product Innovation Award from Architectural Products magazine. The PIA program was created to celebrate the ground-breaking products, systems, and materials that help architects achieve new levels of creativity or performance in their design. Each entry is reviewed by… Read More…

  • NEMRA Announces Jeff Bristol as Vice President of the Newly Formed NEMRA Lighting Division

    The National Electrical Manufacturers Representatives Association (NEMRA) is proud to announce the appointment of Jeff Bristol as Vice President of the newly formed NEMRA Lighting Division. Jeff Bristol most recently served as Senior Vice President of Sales & Marketing for MaxLite, where he was responsible for developing and executing sales and marketing strategies across multiple… Read More…

Design

  • Project Story: Sainte-Thérèse High School Outdoor Lighting Upgrade

    Project Story: Sainte-Thérèse High School Outdoor Lighting Upgrade

    August 6, 2024 Built in 1980, the building that houses Sainte-Thérèse high school, in Quebec Canada, was looking a little worse for the wear. Renovation work began with two major projects: introducing a multidisciplinary sports centre, as well as redesigning the parking lots.  The employee and visitor parking lots were completely reconfigured during phase 1… Read More…

  • Resilience Illuminated: Reviving Westminster Pier Park After Devastating Fire

    Resilience Illuminated: Reviving Westminster Pier Park After Devastating Fire

    In September 2020, the picturesque city of New Westminster near Vancouver in British Columbia suffered a devastating setback when an intentionally set fire destroyed much of the city’s waterfront park, including its urban beach, sand volleyball courts, and iconic art installation known as Wow Westminster. The fire, which burned for ten days before firefighters could… Read More…

New Products

  • SATCO|NUVO: Lacey Collection LED Smart Color-Changing Pendants

    SATCO|NUVO: Lacey Collection LED Smart Color-Changing Pendants

    The Lacey LED pendant collection combines sophisticated design with the advanced functionality of STARFISH Smart technology. Featuring beautiful lead free bubble crystal, these fixtures create a stunning interplay of light, texture, and color. Each bubble sparkles with vibrant hues, while traditional white tones, ranging from warm to natural light, offer a more classic lighting option.… Read More…

  • Contact Delage: New Ketra Lighting by Lutron – Make Your Clients Feel the Vibe

    Contact Delage: New Ketra Lighting by Lutron – Make Your Clients Feel the Vibe

    In a world where light plays a central role in architecture and design, Ketra Lighting by Lutron redefines how we illuminate spaces and influence emotions. With its unique approach and advanced capabilities, Ketra Lighting transforms every residential or commercial project into an immersive and personalized experience. Ketra Lighting stands out with its revolutionary technology, where… Read More…