Brightest LED Puts Light Bulbs in the Shade

Jun 14, 2005

Osram has developed the world’s brightest white light-emitting diode. Known as Ostar Lighting, this LED supplies 200 lumens, thus literally putting light bulbs and neon lamps in the shade. Previously, the brightest LED from the Siemens subsidiary Osram had an output of 120 lumens. As far as its luminosity is concerned, Ostar Lighting can therefore compete with conventional lamps. The system has an average service life of 50,000 hours, or almost 18 years if used for eight hours a day. The new LED is currently being prepared for series production and is scheduled for market launch in early 2006.

The researchers at Osram Opto Semiconductors in Regensburg achieved this extraordinary level of brightness by channeling almost all of the light that is generated by a semiconductor chip at 700 milliampères to the outside. A number of different techniques were used to accomplish this feat. The chip is coated with a metal reflector and a specially structured, microprismic surface that steer light rays directly upward. The chip radiates blue light that is changed into white light by a second, yellow coating.

Because LED technology is still expensive, the extremely bright light-emitting diode will initially be used for special lighting applications such as spotlights, reading lamps, designer lamps and safety lamps. Since the Ostar Lighting system measures only 1 x 3 cm and has an installation depth of six millimeters, it opens up new design opportunities for using LEDs in furniture or buildings, for example.

Explore further: Robot scouts rooms people can't enter

add to favorites email to friend print save as pdf

Related Stories

Vacuum ultraviolet lamp of the future created in Japan

18 hours ago

A team of researchers in Japan has developed a solid-state lamp that emits high-energy ultraviolet (UV) light at the shortest wavelengths ever recorded for such a device, from 140 to 220 nanometers. This ...

Under some LED bulbs whites aren't 'whiter than white'

Apr 18, 2014

For years, companies have been adding whiteners to laundry detergent, paints, plastics, paper and fabrics to make whites look "whiter than white," but now, with a switch away from incandescent and fluorescent lighting, different ...

Vegetables on Mars within ten years?

Apr 15, 2014

The soil on Mars may be suitable for cultivating food crops – this is the prognosis of a study by plant ecologist Wieger Wamelink of Wageningen UR. This would prove highly practical if we ever decide to ...

A homemade solar lamp for developing countries

Apr 14, 2014

(Phys.org) —The solar lamp developed by the start-up LEDsafari is a more effective, safer, and less expensive form of illumination than the traditional oil lamp currently used by more than one billion people ...

Recommended for you

Zynga founder Pincus leaving operations role

10 hours ago

Online game maker Zynga says company founder Mark Pincus is stepping down as chief product officer, less than a year after he was replaced as the company's CEO.

US urged to drop India WTO case on solar

10 hours ago

Environmentalists Wednesday urged the United States to drop plans to haul India to the WTO to open its solar market, saying the action would hurt the fight against climate change.

User comments : 0

More news stories

Is nuclear power the only way to avoid geoengineering?

"I think one can argue that if we were to follow a strong nuclear energy pathway—as well as doing everything else that we can—then we can solve the climate problem without doing geoengineering." So says Tom Wigley, one ...

US urged to drop India WTO case on solar

Environmentalists Wednesday urged the United States to drop plans to haul India to the WTO to open its solar market, saying the action would hurt the fight against climate change.