Sunday, July 31, 2011
Boston projects that its SSL street-light project will deliver $1.1 million in
annual electrical savings, reducing power consumption by 8.9 million kW/h, and greenhouse gas emissions by 5000 tons. Boston Mayor Thomas Menino said, “Not only do thes
e lights help reduce greenhouse gas emissions, they also save the City money in tough economic times. We’re excited to add these aesthetic and durable lighting fixtures to our streets.”
Boston's New LED Lights
The Mayor noted durability as an advantage, and Philips Hadco says that the RX1 and RX2 luminaires being used in the project are rated for 18 years of life. The luminaires utilize the Philips Hadco LEDGINE modular LED array technology that comes in a choice of 3000K, 4000K, and 5700K color temperatures.“This investment in LED lighting is aesthetically, environmentally and economically beneficial, a combination that all taxpayers can appreciate,” said Glenn Cooper, Associate Electrical Engineer, Street Lighting Division, City of Boston. “Philips Hadco delivered on everything we were looking for – from energy savings and outage reductions to enhanced visibility and improved light uniformity.”
Weston SSL project
Philips’ Roadway division is behind the Weston SSL project that is being funded in part by a US Department of Energy (DOE) Energy Efficiency and Conservation Block Grant (EECBG). Weston hopes to save $160,000 annually in energy costs and another $100,000 annually in maintenance costs.
The Roadstar luminaires are replacing existing metal-halide lamps, and the city noted lighting quality benefits along with savings as motivation for the project.
“Street lighting accounts for a large part of our energy consumption and the solution from Philips Roadway provided us with energy savings, improved light levels and reduced maintenance, making it the right choice for our city,“ said Jeffrey Skidmore, Assistant City Manager and Chief Operating Officer, City of Weston. “Feedback from our residents is that they appreciate the uniform, white light that virtually eliminates the dark spots between poles, as well as spill and glare. It also provides a clean look that fits the overall aesthetic of our community.”
Philips worked with Municipal Lighting Systems on the Weston project. Moreover, engineering firm Calvin Giordano & Associates assisted the city in evaluating LED lighting technology and Horsepower Electric is handling the installation.
Saturday, July 30, 2011
|Solar panels integrated on LED area-light poles feed power onto the grid during daytime peak electrical usage to compound the energy savings of SSL technology.|
Inovus Solar has announced the first installation of its LED-based On-Grid Solar Street Light poles in a Boise, Idaho big-box retail store called WinCo Foods. The poles have integral solar panels and inverters that supply electricity onto the grid during the day, essentially reducing the cost of electricity used by the store during peak periods, while the grid powers the solid-state lighting (SSL) at night when rates are lower.
The WinCo installation includes six Inovus light poles equipped with LED-based Evolve luminaires from GE Lighting that are located around the perimeter of the parking lot. Inovus also includes wireless communications capability in the poles that allows for adaptive control – for instance dimming the lights late at night to compound the baseline energy savings attributable to SSL.
WinCo projects that the on-grid solar SSL installation will save 24,000 kW/h per year, and eliminate 16,000 pounds of CO2 emissions. WinCo hopes the pilot installation leads toward using the LED and solar combination at all new stores and to retrofit other locations over time.
|LG Innotek has installed over 10,000 LED luminaires throughout its LED manufacturing complex in Paju, Korea.|
|Korean-based LG Innotek, a vertically-integrated manufacturer of LEDs for displays and lighting, claims it has built the single-largest LED production complex in the world in Paju, Korea. The manufacturing facility performs all aspects of LED production, from epitaxial wafer growth to LED module production.|
In related news, LED lighting has also been installed throughout LG Twin Towers, LG Electronics’ headquarters in Seoul. The lighting in the two towers is designed to save 1717 MWh of electricity annually.
The company estimates that the energy saved in this first year is comparable to the effect of planting 63,000 pine trees in the area. This is based on the generation of 317 tons of CO2 from 173,000 kW of electricity and the absorption of 5 kg CO2/yr per pine tree.
The Paju LED installation uses various high-efficiency LED lighting modules that were developed by LG Innotek, including ModulA, a planar-panel lighting module, and ReflectA, an indirect reflection-type lighting module.
The LED production facility has a targeted production level of 1.8 billion LED units per month. The three-story production building features a combined floor space of 58,000 square meters. It features production lines for 6-inch epitaxial wafers, LED chips, and LED modules for LED backlighting units for LCD TVs as well as LEDs for lighting.
The company expects to create 2000 jobs in its first year of operation and 4000 jobs overall.
An LG Innotek official said, “LED lighting is the best lighting source currently available, as it is akin to solar lighting, but does not emit ultraviolet light, and can be used for a long time. It can also change color according to the lighting environment.” He added, “High prices, which were considered the greatest obstacle to the expansion of LED lighting use, are being addressed quickly due to the development of core technologies and the expansion of production capacities.”
|Panelists at the US DOE SSL Workshop discussed a Caliper study on LED replacement lamps purchased at retail, which found the LED lamps generally did not meet the performance of the benchmark lamps.|
|At last week’s US DOE Solid-State Lighting Market Introduction Workshop in Seattle, WA (July 12-14), industry professionals considered whether LEDs can truly compete in the replacement lamp market. A summary report shows that LED replacement lamps purchased from different retail outlets between June and August 2010 often did not match the incumbent products they were designed to replace in terms of light output, color quality and lifetime expectations.|
Samples of 33 LED replacement lamps, three units each, were first evaluated for light output, efficacy, power factor, chromaticity and color rendering. The lamps were then operated for 1000 hours and tested again. They were tested using the IES LM-79-08 standard (Electrical and Photometric Measurements of Solid-State Lighting Products). Measured product performance was compared with the manufacturer’s claims on the product packaging. The initial and 1000-hour test data sets were compared to provide an indication of the likelihood that products will meet their lifetime claims.
A range of types of SSL lamps were purchased that mimic conventional technologies in shape and size, including five A19, four B10 (candelabra), two C7 (night light), eleven MR16/PAR16, four PAR20, and seven PAR30. The authors of the report warn that this study represents only a sampling of the available replacement lamps and should not be used as a judgment of specific products, retailers or manufacturers.
Only a few of the products met or came close to meeting the average light output of the benchmark products. Two of the five A19 lamps came close to meeting the output levels of a 40W incandescent A19 lamp; four of the eleven SSL MR16/PAR16 lamps came close to meeting the light output levels of a 20W halogen MR16; none of the four PAR20 SSL lamps achieved the light output of a 35W halogen PAR20; and three of the seven SSL PAR30 lamps came close to meeting the light output levels of a 50W halogen PAR30 lamp.
For instance, most products are marketed as replacements for incandescent products, implying a CCT of 2700-3000K. However, ten products had CCTs above 4000K. Thirteen products had CCTs above 3000K, perhaps making them a colder white than might be acceptable, while 16 were in the acceptable 3000K region. When all aspects of color quality were considered (CCT, CRI, and/or Duv), over half of the products had one or more unacceptable metric.
Fourteen of the 33 products had a power factor above 0.80. The other products had a range of power factors from 0.29 to 0.70.
The manufacturers’ claimed product lifetimes were in the range of 12,000 to 50,000 hours. After 1000 hours, three products operated at less than 70 percent of initial light output, while 12 other products exhibited less than 97 percent of initial light output. After 1000 hours, the remaining eighteen products exhibited between 97 and 100 percent of initial light output, with the greatest chance for meeting lifetime expectations. Notably, four of five Lighting Facts-labeled products performed at or near the original light-output levels after 1000 hours.
When lamp performance was grouped by retailer two retailers featured lamps with better performance overall, indicating that certain retailers may be implementing stricter screening procedures on the lamps they sell.
Packaging claims for most of the products included light output (lm), CCT and lifetime. The rated claims for light output and CCT were close for most of the products. However, when equivalency claims were provided (such as “5W = 40W light output”), they were inaccurate. The products did not provide the equivalent output.
The DOE suggests that consumers use data from the Lighting Facts label or LM-79 testing rather than manufacturer’s equivalency claims. They recommend improved education regarding color quality, light output, and the Lighting Facts and Energy Star programs to allow more informed purchasing decisions.