LED + SSL

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. [...]

The 11th annual Department of Energy Solid-State Lighting R&D Workshop, held January 28–30 in Tampa, Florida, educated its 200 attendees with topics including creating added value with intelligent lighting and using spectral control to shape the lighting experience. Click here to download the presentations.

In late 2012, the California Energy Commission (CEC) published a voluntary specification recognizing quality LED lamps intended to replace screwbase incandescent lamps in luminaires. Called the Quality LED Lamp Specification (QLS), it covers a range of omnidirectional and directional (spot and flood) lamps.
 California utilities are now required to promote lamps that satisfy the spec [...]

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The U.S. Department of Energy (DOE) has published a new report that documents early challenges and lessons learned in the development of the SSL market. Solid-State Lighting: Early Lessons Learned on the Way to Market summarizes early actions taken by DOE and others to avoid potential problems that were anticipated based on lessons learned from [...]

Republication of Postings from the U.S. Department of Energy (DOE) Solid-State Lighting Program by Jim Brodrick, U.S. Department of Energy Next to energy efficiency, long life is probably the most publicized of solid-state lighting’s (SSL) potential advantages, and plays a key role in any cost-benefit analysis. But understanding how LED lighting products fail, and communicating [...]