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News on Green Movement
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The NYT Magazine follows the brainiacs of storied VC firm Kleiner Perkins for a few months and concludes...green tech is real but the financial pay-off has yet to roll in. Six Products, Six Carbon Footprints - WSJ.com Part of an environmental package ...
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"Our new distribution partnership with one of the nation's largest natural foods retailers underscores the contribution Perf Go Green products make to a healthier environment," said Chairman and CEO Tony Tracy. "By using our biodegradable plastic ...
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Oct. 6: TODAY?s Ann Curry talks to Jim Stickley, author of ?The Truth About Identity Theft,? about protecting yourself from becoming a victim of the crime. So each afternoon I waited in the parking lot and watched members of the management team ...
Product Scroller
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Home  Blog
A blog of all articles
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Automobile Performance
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Written by Website Admin
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Monday, 11 February 2008 |
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Take a look at these wind-powered robotic "Art Pieces"! Like a modern-day Leonardo da Vinci genius, conducting an experiment at the beach.
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Read more...
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Automobile Performance
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Written by Website Admin
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Saturday, 09 February 2008 |
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Here is part 2 and concluding video on the contest between 3 great cars; the Aston Martin V8 Vantage, BMW M6, and Porsche 911 Carrera S.
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Read more...
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Automobile Performance
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Written by Website Admin
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Wednesday, 06 February 2008 |
3 car-loving men, 3 fantastic Gran Turismo (GT) cars, 1 tough decision. Aston Martin V8 Vantage vs BMW M6 vs Porsche 911 Carrera S, which is the BEST?
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Read more...
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LED Lightings
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Written by Miew Leng
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Tuesday, 22 January 2008 |
Recessed downlights are the most commonly installed type of lighting fixture in residential new construction. New developments in LED technology and luminaire design may enable significant energy savings in this application. This fact sheet compares the energy and lighting performance of downlights using different light sources.
Although originally intended for directional lighting, recessed downlights are now used widely for general ambient lighting in kitchens, hallways, bathrooms, and other areas of the home. Other types of downlights using spot lamps, reflectors, and lenses are also used for art, accent, display, and wall lighting. In some applications, like media rooms and dining areas, downlights are operated on dimming circuits. The most common light source used in residential downlights is a 65-watt incandescent reflector-style lamp with a standard Edison base. Other commonly used options include A-type incandescent lamps, and PL-type, spiral, or reflector CFLs.
The light output of a traditional recessed downlight is a function of the lumens produced by the lamp and the luminaire (fixture) efficiency. Reflector-style lamps are specially shaped and coated to emit light in a defined cone, while “A” style incandescent lamps and CFLs emit light in all directions, leading to significant light loss unless the luminaire is designed with internal reflectors. Downlights using non-reflector lamps are typically only 50% to 60% efficient, meaning about half the light produced by the lamp is wasted inside the fixture. Recently, LED downlights have come on the market.
Recently, LED downlights have come on the market.
Below are examples of performance data for residential recessed downlight using several different light sources, including two LED products. These data should not be used to generalize the performance of fixture types, but are provided as examples.
Examples of Recessed Downlight Performance Using Different Light Sources
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