By Szymon Slupik, President & CTO, Silvair Energy saving is the primary feature of lighting control systems. The concept is well known: dim the lights if there is…
Here is a look at ten color rendering metrics: CRI / Ra: The most used Color Rendering Index (CRI), is based on averaging the first 8 test colors (R1–R8),…
The American Lighting Association (ALA) put out a government affairs newsletter, last week, summarizing a trio of federal trade actions announced in early June that are poised to reshape…
“Shadow” is best understood as a lighting-design methodology that intentionally uses shadow as a design material, not as a flaw to eliminate. In practice, it means shaping light so shadows…
By Eric Bretschneider, Ph.D Excerpts from a larger technical report, linked below. Executive Summary This report details a photobiological hazard assessment of the general concept of Orbital Solar Reflectors (OSRs).…
By Brian Liebel & Rick Utting, DarkSky International, Tucson, AZ. Executive Summary Upward-emitted outdoor light has long been identified as a source of atmospheric light pollution, a.k.a. sky glow.…