DOE Presenting Two SSL Webinars, “Understanding Technology Tradeoffs in High-Efficacy Luminaires,” and “Sky Glow Comparison Tool”

The U.S. Department of Energy (DOE) scheduled two solid-state lighting webinars, one on Oct. 25 at 2 pm EDT, and the other on Nov. 8, at 1 pm EST. The first webinar is titled, “Understanding Technology Tradeoffs in High-Efficacy Luminaires,” and the second is titled, “Sky Glow Comparison Tool.”

Understanding Technology Tradeoffs in High-Efficacy Luminaires

The 2018 DOE study, “An Investigation into High-Achieving LED Luminaires” assessed the performance of several LED lighting products with claimed efficacies near or exceeding 200 lumens per watt (LPW). The objective of the study was to confirm the claimed efficacy, determine the features or characteristics the products had in common, and identify any performance compromises in luminaires that reach this very high efficacy level.

All of the products examined were 5000K industrial luminaires, and all but one featured exposed LED emitters. The study compared photometric test results of the samples with the manufacturer-claimed values. Additionally, the measured and observed the horizontal illuminance, flicker, and maximum luminance of the samples, which were also evaluated by 23 knowledgeable observers.

Luxeon High Power

On October 25th at 2:00 pm EDT, Naomi Miller of Pacific Northwest National Laboratory will present key conclusions from the study in a webinar that looks at performance tradeoffs between efficacy, lumen output, light distribution, color temperature, and visual comfort. The presentation will run approximately 40 minutes, with the remaining time allotted for questions and answers.

Click here for more information or to register.

Sky Glow Comparison Tool

The DOE says that the increasing presence of sky glow, a reduction of night-sky visibility due to greater levels of artificial light has been a growing concern in the lighting community for some time.

However, short of obeying general design guidelines, estimating a lighting product’s influence on the skyglow, or of identifying the most-effective approaches for reducing is rarely simple.

After completing a recent study about LED street lighting’s impact on sky glow, researchers at Pacific Northwest National Laboratory devised a simplified approach to comparing contributions to sky glow among lighting products. The method of comparison they created uses various combinations of output characteristics such as spectral content, light output level, and percent uplight.

During the process of the investigation, the DOE created a simulation of to help quantify the contribution of individual luminaires to overall skyglow. After running the simulation more than 215,000 times, the large generated data set lead the investigators to devise a simplified estimation method for the Skyglow contribution of an individual product. The DOE has since incorporated the methodology into a spreadsheet, now referred to as the Sky Glow Comparison Tool.

The tool enables a relatively simple, comparison of the contributions to sky glow from various combinations of the noted lighting characteristics. The DOE designed the comparison tool to be user-friendly, with familiar inputs and outputs. According to the DOE, the tool addresses an existing gap in the design toolkit.

During an hour-long webinar on November 8 at 1:00 pm EST, Pacific Northwest National Laboratory’s Bruce Kinzey will explain and demonstrate the use of the comparison tool.

Click here for more information or to register.