LED + SSL

The U.S. Department of Energy’s CALiPER program has released an Application Summary Report that focuses on the bare-lamp performance of 31 linear LED lamps intended as an alternative to T8 fluorescent lamps. The testing covered light output, input watts, efficacy, color, power factor and beam angle. Products listed as satisfying DesignLights Consortium criteria and those [...]

A research team led by the Institut de Physique et de Chimie des Matériaux de Strasbourg (IPCMS, CNRS/Université de Strasbourg), in collaboration with UPMC and CEA, has developed the first ever single-molecule LED. The device is formed from a single polythiophene wire placed between the tip of a scanning tunneling microscope and a gold surface. [...]

In April, ELECTRICAL CONTRACTOR published an article I wrote about OLED general lighting. The technology is extraordinary and offers good energy savings potential and unique user experiences, but its development is about seven years behind LED, and significant advances must occur before broader adoption is possible. Read it here.

The U.S. Department of Energy’s CALiPER program has released a special report on LED lamps available through the retail marketplace and targeted toward general consumers. The report follows similar reports published in 2011 and 2012. LED replacement lamps are available through many retail outlets, and CALiPER testing offers insights on performance trends from year to [...]

In his article in the February edition of LD+A, Steve Landau of LED module manufacturer Xicato advises designers to ask luminaire manufacturers 10 questions before specifying LEDs for their projects. Click here to read it.

Republication of Postings from the U.S. Department of Energy (DOE) Solid-State Lighting Program by Jim Brodrick, U.S. Department of Energy All lighting systems decline in lumen output over time, due to reductions in lamp emissions and changing surface properties. This decline is typically accounted for by applying a light loss factor (LLF) during the design [...]

Underwriters Laboratories, Inc. (UL) recently announced the launch of the Type TL Program, which offers a set of certification guidelines designed to create a more efficient path for manufacturers in developing new LED luminaire products. Through the flexibility of the UL Recognized Component program, LED drivers, an electrical device which regulates power to an LED [...]

On Tuesday, April 15, the U.S. Department of Energy’s (DOE) Solid-State Lighting Program will host a 60-minute live webinar entitled LED Color Stability: 10 Important Questions. The lumen maintenance lifetime of many LED products is 25,000 hours or more, but that doesn’t mean products are guaranteed to perform the same over that time. One thing [...]

On Monday, April 14, DOE’s Municipal Solid-State Street Lighting Consortium will host a 90-minute live webinar entitled Maintenance Practices for LED Streetlights. The relative newness of LED streetlights naturally prompts important questions about maintenance and reliability, and how to take these issues into account when planning and preparing for a transition to LED street lighting. [...]