Mark Lien, industry relations manager for the IES, recorded an audio version of his free-verse column written for the May 2021 issue of LD+A. Titled “Beyond Sunset,” the poem traces the trajectory of lighting history from the origins of electricity to modern day ..read more

We recorded a special Forces of Change video interview in March 2020 to provide a report on the impact of COVID-19 on lighting professionals from the vantage point of some prominent individuals representing various roles within our industry. Moderator Mark Lien talked with Diane Borys (Noctiluca Lighting Design and Consulting), Megan Carroll (New York Digital), Erik Ennen (MNCEE), Bob Preston (Capital Electric Supply), and Randy Reid (Edison Report). Now in November 2020, eight months after the initital discussion,  ..read more

We have recorded a special Forces of Change video interview to provide a report on the impact of COVID-19 on lighting professionals, during these difficult times, from the vantage point of some prominent individuals representing various roles within our industry. Hear from Diane Borys (Noctiluca Lighting Design and Consulting), Megan Carroll (New York Digital), Erik Ennen (MNCEE), Bob Preston (Capital Electric Supply), Randy Reid (Edison Report), and moderator Mark Lien (Illuminating Engineering Society ..read more

Harold (Hal) Wallace, the Curator of the Electricity Collection at the Smithsonian Institution’s National Museum of American History sits down with host Mark Lien for a fascinating conversation about the history of electric lighting on another edition of Forces of Change ..read more

Dr. Karma Sawyer of the DOE is Mark Lien’s guest and they discuss where the DOE is heading in 2020 and beyond specifically with regards to lighting ..read more

Mark Lien sits down with Dr. Robert Karlicek of LESA at RPI to discuss how Intelligent Lighting Systems can transform how people live and work ..read more

Probably no one in North America is more responsible for energy-saving dollars in lighting than James Brodrick over the last two decades. Jim reflects with Mark Lien on his work at the DOE and what he planning to do now and into the future ..read more

The inventor and Noble Prize winner Shuji Nakamura discusses his invention of blue pump yellow phosphor white light LEDs and what he sees going forward ..read more

Eunice Noell-Waggoner sits down with Terry McGowan and discusses her career signature research and crusade for more empathy in lighting design for seniors and those with low vision ..read more

The purpose of this article is to evaluate from a biological standpoint the rationale for the establishment of a Circadian Lighting standard put forward by UL under the direction of Dr. Mark Rea of the Lighting Research Center at Rensselaer Polytechnic Institute. This critique is limited in scope but also applies to utilization of the Circadian Stimulus (CS) calculator also developed by the LRC ..read more