LED + SSL

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 [...]

Check it out here.

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 [...]

The U.S. Department of Energy (DOE) has published the findings of a new study utilizing a highly accelerated life-test method (called the “hammer test”) intended to produce failures in SSL luminaires in a reasonable test period, with the goal of providing insight into potential failure modes. Entitled Hammer Testing Findings for Solid-State Lighting Luminaires, the [...]

Chris Bailey, Director of Hubbell Lighting’s Lighting Solutions Center, writes an interesting blog post about how to evaluate LED luminaires based on drive current and current density. He writes: “When evaluating the working stresses of a semiconductor device, such as an LED, the output current from the power supply or the current delivered to the [...]

LED Journal recently published a useful summary of UL standards applicable to LED lighting, written by Diana Pappas Jordan, Standards Program Manager. Get it here.