A street light and a lamp replacement method

Japanese Patent JP5968482

B2

[Problem] To provide a light-emitting diode lamp with which it is possible to obtain a broader light distribution and light emission intensity in the length direction of the lamp, and with which heat can be dissipated efficiently and which therefore has a longer operating life. [Means of overcoming the problem] A light-emitting diode lamp (20) is provided with a light-emitting diode unit (10) in which light-emitting diodes (11) are mounted on the side surfaces of a prismatic support member (13), and a cylindrical glass bulb (21) having a prescribed bulb diameter, inside which the abovementioned light-emitting diode unit (10) is arranged, and if the width w of one side surface of the above-mentioned support member (13) is fixed at a prescribed width w, the distance k from the center of one side surface of the abovementioned support member (13) to the inner surface of the bulb is fixed at a prescribed distance, and the cross- section through the abovementioned prismatic support member (13) is a regular n-sided polygon, then the abovementioned n is a value whereby the abovementioned light-emitting diode unit (10) can be arranged inside a cylindrical bulb having the abovementioned prescribed bulb diameter, and is a value which is determined based on the abovementioned prescribed bulb diameter, prescribed width and prescribed distance.

Takahiro Akuta
Hiromi Muramatsu
Keizo Oishi
Tatsuya Suzuki
Takashi Osawa
Okuyama Junichi

JP2015046271A

August 10, 2016

March 09, 2015

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Mitsubishi Electric Lighting Co., Ltd.

F21S8/08; F21S2/00; F21V19/00; F21V21/116; F21V23/00; F21V31/00; H01L33/00

JP2011081919A
JP7085707A
JP2008027910A
JP2011096453A
JP3106448U

US20070253198

Shoji Mizoi

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