Toshiba to Release Industry's Most Efficient LED Light Bulbs

Toshiba Lighting & Technology Corp will release high-output LED light bulbs with a total flux equivalent to that of a 60W incandescent lamp.

(Left) Components of the light bulb. (Right) An LED package developmed by Toshiba Lighting & technology.

Equipped with a large-size LED package that measures approximately 15 x 15mm, the natural white type and the warm white type feature total fluxes of 810lm and 600lm, respectively. Power consumption of both LED light bulbs is 8.7V. And the luminous efficiency of the natural white type is 93lm/W, which is higher than those of any other similar products announced so far.

Toshiba Lighting & Technology improved luminous efficiency by dispersing more than a hundred LED chips in a large package to prevent heat from concentrating. For its previous products, the company used Nichia Corp's general-purpose LED package. But, this time, Toshiba Lighting & Technology developed its own LED package, aiming at a total flux 1.5 times higher than that of the company's former product that is equivalent to a 40W incandescent lamp in terms of total flux.
However, as the brightness increases, so does the total amount of heat. Therefore, the company elongated the chassis by 10mm to 119mm to expand the radiating area.

The company will release the new LED light bulbs Oct 16, 2009, aiming to sell 70,000 units in fiscal 2009.

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