Toshiba to release 93 lm/W LED bulb

Oct 1, 2009 Toshiba Lighting & Technology Corp will release high-output LED light bulbs with a total flux equivalent to that of a 60W incandescent lamp.

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 810 lm and 600 lm, respectively. Both versions consume 8.7W. The luminous efficiency of the natural white LED bulb is 93 lm/W, which is higher than those of any other similar products announced so far.

Toshiba LED chip New bulb is longer than previous version.

Toshiba 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 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. 

Bulb TypeFlux,
Input Power,
Natural White8108.793
Warm White6008.769

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


Author:  Yaroslav Oleksenko

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