Toshiba Lighting Technology has released two cylindrical (T-shaped) products (daylight and incandescent) for the "E-CORE" series of LED bulbs. The brightness is equivalent to a 40W bulb (600 lumens for daylight products and 485 lumens for incandescent products) and rated power consumption is 7.4W. This is the company's first T-shaped LED bulb.
Toshiba Lighting Technology plans to replace the cylindrical fluorescent bulbs (D-shaped and T-shaped, D-shaped fluorescent tube exposed style, T-shaped with shaded style). Appliances that use D- and T-shaped fluorescent bulbs are mostly small-sized, and in many cases cannot be fitted with ordinary LED bulbs with E26 sockets. The new product (T-shaped 7.4W) can be mounted on special appliances for D-shaped and T-shaped fluorescent bulbs (excluding insulation construction tools). Therefore, it is suitable for a downlight that can be installed laterally at the lamp socket, and a lighting fixture that requires the overall brightness of the lamp, such as a wall lamp and a chandelier. In addition, it can also be used for airtight appliances such as bathroom lights. However, it cannot be used for appliances and circuits with dimming function.
The T-shaped 7.4W product has the same external dimensions as the Toshiba lighting technology D-shaped fluorescent bulb (FED15/13-Z), with an outer diameter of 40mm and a total length of 109mm. The light distribution angle is about 300 degrees, which is also the same as the D-shaped fluorescent bulb. The product is capable of achieving a large light distribution angle thanks to the use of the inner surface reflection of the cylindrical lamp cover and the arrangement of the LED light source at a lower position on the bottom surface of the lamp cover.
In addition, the brightness of the FED15/13-Z as a comparison object is equivalent to the 60W bulb (810 lumens) used for general lighting, and is brighter than the T-shaped 7.4W product (equivalent to a 40W bulb). Toshiba Lighting Technology Co., Ltd. said it will continue to develop T-shaped LED bulbs, and plans to introduce products with the same size and light distribution angle as D-shaped and T-shaped fluorescent bulbs.
Both T-shaped 7.4W products will be available for sale starting February 10, 2012. For the suggested retail price (including tax), the incandescent color (model: LDT7L-G) and daylight color (model: LDT7N-G) are both 5,670 yen (about 470 yuan). It weighs 125g and has a rated life of 40,000 hours. The sales target is a total of 240,000 products per year.
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