LED + SSL

Republication of Postings from the U.S. Department of Energy (DOE) Solid-State Lighting Program by Jim Brodrick, SSL Program Manager, U.S. Department of Energy The advent of SSL has already brought substantial change to the lighting industry, and one recent development that’s especially intriguing is color-tunable luminaires — that is, luminaires that can change their spectral [...]

This article is my contribution to the November 2015 issue of tED Magazine, published by the National Association of Electrical Distributors (NAED). Reprinted with permission. As LED lighting transforms the lighting industry, another solid-state lighting technology continues to make strides and offer dramatic possibilities as a complementary source. This technology is the organic LED, or [...]

Colorado Lighting’s Norma Frank, CLMC’s contribution to the October issue of LD+A makes the case of maintaining LED lighting. (I’m proud to say Colorado Lighting is one of my clients.) LED luminaires are not “install and forget” devices, Frank argues. While they don’t require the same level of maintenance as conventional lighting, they must be [...]

The U.S. Department of Energy’s CALiPER program has released Report 22.1, which is part of a series of investigations on LED MR16 lamps. Report 22 investigated the photometric performance of 27 LED MR16 lamps compared to benchmark halogens. Report 22.1 examines the photoelectric performance of that same set of lamps, using commercially available transformers and [...]

Republication of Postings from the U.S. Department of Energy (DOE) Solid-State Lighting Program by Jim Brodrick, SSL Program Manager, U.S. Department of Energy Central to any LED lighting product is the LED package, because that’s where the light is generated. Initially, the goal was to develop one type of LED package that would be suitable [...]

The U.S. Department of Energy’s CALiPER program has released Report 23: Photometric Testing of White-Tunable LED Luminaires, which is the first in a planned series of investigations on color-tunable LED luminaires. The main goal of the new study was to understand the amount of testing required to characterize a white-tunable LED lighting product. In this [...]

An article I wrote for tED Magazine. Reprinted with permission. In the construction of some facilities, a skeletal framework is used, which forms an interior subspace called a bay. The Illuminating Engineering Society categorizes these bay spaces as either high-bay (>25 ft. off the floor) or low-bay (15-20 ft. These high-ceiling interior spaces are common [...]

The U.S. Department of Energy has released a report on a GATEWAY demonstration, in which maintenance and energy costs were significantly reduced while retaining the quality of light when LED modules replaced 87 halogen lamps in existing wall washers at the University of Maryland’s Clarice Smith Performing Arts Center. The project began with mockups in [...]

I wrote a feature article about LED drivers for the April issue of ELECTRICAL CONTRACTOR, which I’m happy to share with you here. The article describes the purpose and functionality of LED drivers, constant voltage versus constant current, major trends, and things to know during selection.