Hitachi to Release LED Light Bulb as Bright as 100W Incandescent Lamp

Jun 21, 2012
Ikutaro Kojima, Tech-On!
The new LED light bulb (photo courtesy of Hitachi Appliances)
The new LED light bulb (photo courtesy of Hitachi Appliances)
[Click to enlarge image]

Hitachi Appliances Inc announced what it claims is the industry's first E26-base wide-light-distribution-type LED light bulb that emits the amount of light equivalent to that of a 100W incandescent light bulb (1,520lm).

The company will release the LED light bulb, "LDA15D-G," July 13, 2012, in Japan.

Hitachi Appliances realized the amount of light equivalent to that of a 100W incandescent light bulb and a wide light distribution angle like the light of an incandescent light bulb by employing (1) a high-efficiency LED module, (2) the "Slit Structured Body," whose slit has an about 1.3 times wider radiation area than the slit of the company's existing product to efficiently release heat generated by the LED module and (3) the "Light Diffusion Cover," which widely diffuses LED light and reduces the unevenness of the light transmitted through the cover.

Compared with a 100W incandescent lamp, the power consumption and rated product life of the new bulb are about 1/6 and 40 times longer (40,000 hours), respectively, the company said.

With a power consumption as low as 15.0W, the LED light bulb can replace a 60W or 40W incandescent lamp. Therefore, it enables to easily improve brightness and lower power consumption just by replacing an incandescent lamp, Hitachi Appliances said.

With its protective function, the LDA15D-G automatically lowers its temperature (and brightness) when the temperature or humidity becomes high. Therefore, it can be used for closed appliances.

However, it cannot be used outdoors and does not support dimming control systems. Also, because it has an external diameter of 60mm and a total length of 123mm and is larger than a 100W incandescent lamp, it probably cannot be used for some appliances.

Furthermore, Hitachi Appliances will release an E26-base wide-light-distribution-type LED light bulb whose brightness is equivalent to that of a 80W incandescent lamp (1,160lm) on the same day. Its product number is "LDA15L-G." The size, product life and other specifications of the LDA15L-G are basically the same as those of the "LDA15D-G." Both of the light bulbs do not have manufacturer's suggested retail prices.