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The Lighting Engineer Who Thought Outside the Box June 25, 2009

Posted by Dr. Z Bulbs in cfl, light bulb, Light Fixtures, Weird Bulb News.
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Dr. Yoon and two of his "girlfriends"

Dr. Yoon and two of his "girlfriends"

Zoinks! Its me Dr. Z, Pharoah of the Fluorescent and Lord of Light! Here is a great article on Dr. Yoon Jae-dong who developed a reflective socket for recessed lighting, which offering more light for less power. Dr Yoon is  a lot like me. In his words :in . “These days, all I ever look at are light bulbs wherever I go,” Yoon says. “It’s as if they are my girlfriends.” Zoinks ! and Mr. Y says I’m a nerd!

listen learn and read on

Dr. Z




Dr. Yoon Jae-dong of JCI Display has developed a reflective socket for recessed lighting, a so-called troffer, that may look like plastic but is greatly more effective than the standard product, thus offering more light for less power.

Dr. Yoon Jae-dong of JCI Display

“Low-carbon, green growth is the focus of attention these days, and it makes me happy to have developed a method of radically lowering electricity use and carbon dioxide emissions simply by replacing troffers,” Yoon says. He cited 236 housing units in an apartment complex in Cheongju. “In three rooms at each of those apartments, we removed one 36 W bulb, eliminating a total of 708 bulbs. If you consider each of those bulbs being used five hours a day, we estimate around 46,000 KW of electricity saved each year and a reduction of 20,800 kg of carbon dioxide emissions.” 

Based on this estimate, removing three light bulbs in 6.88 million households across Korea would end up saving around W1.35 million MW of electricity — the equivalent of saving 1.3 times the amount of electricity generated by the Seoul Thermal Power Plant, which produced around 900,000 MW in 2008. That would also lead to a 610,000 ton reduction in carbon dioxide emissions. Adding commercial lighting, the amount of electricity saved would be astronomical, Yoon says.

For a long time, Yoon questioned the traditional belief that turning off the lights saves electricity. Working as a researcher for LG Electronics, he became curious about the energy-saving effects of reflecting the light that seeps out from the backs of lamps. He realized that all of the sheets used to reflect backlight in LG’s LCD TVs were made in Japan and felt it would be useful to develop Korean-made versions and use them to reflect light from light bulbs.

In June 2006, Yoon went to the University of Toronto in Canada to take a post-doc program, and there he found the answer to his quest in polypropylene, a cheap and environmentally friendly material. He returned to Korea in 2007, opened his own company and began developing prototypes. He experimented 500 times over the course of a year and was eventually able to develop a PP sheet with a 99 percent reflection rate called “Reflect All.” He received a patent for that product in Korea in March last year and set up mass production facilities after making modifications. He recently applied for patents in eight countries, including the United States and Japan. “These days, all I ever look at are light bulbs wherever I go,” Yoon says. “It’s as if they are my girlfriends.”