Hitachi Appliances Inc. will release the LED light bulb, “LDA15D-G,” July 13, 2012, in Japan that’s claimed to be 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. This is quite a feat and offers some satisfaction for an alternative to lots of small bulbs.
Hitachi designed for 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 using a high-efficiency LED module, their “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 the “Light Diffusion Cover,” which widely diffuses LED light and reduces the unevenness of the light transmitted through the cover.
The power consumption and rated product life of the new bulb compared with a 100W incandescent lamp are about 1/6 and 40 times longer (40,000 hours), respectively, as reported by the company.
Hitachi points out your humble authors concern, with power consumption as low as 15W, the LED light bulb can replace a 60W or 40W incandescent lamp. At the higher rating it becomes possible to easily improve brightness and lower power consumption just by replacing an incandescent lamp.
The bulb has intelligence on board as well. Using its protective function, the LDA15D-G automatically lowers its temperature (and brightness) when the temperature or humidity becomes high so it can be used for closed appliances.
The downside for the first model is it cannot be used outdoors and does not support dimming control systems. Another issue is it has an external diameter of 60mm and a total length of 123mm, larger than a 100W incandescent lamp, so it won’t be a universal replacement.
Hitachi will be releasing an E26-base wide-light-distribution-type LED light bulb whose brightness is equivalent to that of an 80W incandescent lamp (1,160 lumens) 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.”
Neither of the light bulbs have manufacturer’s suggested retail prices, yet.
Grid electrical power isn’t quite the hot button for consumers that it will be in the coming months and years. As Al Fin shows in his review of the FOCUS Magazine examination of the impending disaster slowing creeping through the German economy electricity is going to get much more expensive across the world. Remember, all those alternative power generators with preferential access are the high cost leaders.
That makes Hitachi’s news important. The ubiquitous 100W bulb is a mainstay of lighting and a replacement is critical, as in the U.S. for example, the incandescent is about to be outlawed.
Lets hope the retail price is another strong incentive to switch.