| 摘要 |
PURPOSE:To make heat radiation holes inconspicuous so as to be better appear ance of the luminaire by forming a tubular wall body which protrudes inwardly to the center of the back face of a tubular body and which has the plurality of heat radiation holes, and also providing within the tubular wall body a back face-cover which has a space for heat radiation between the peripheral portion and the wall body. CONSTITUTION:A tubular wall body 3 protruding inwardly to the center of the back face of a tubular body 1 and having a plurality of heat radiation holes 12 is formed, and also a lamp 4 is disposed within the tubular body 1, and a back face-cover 5 having a space for heat radiation defined between the peripheral portion and the wall body 3 is provided within the tubular wall body 3. Thus, a heat radiation hole 2 located on the side of the tubular body 1 is provided within the tubular wall body 3 provided at the center of the back face of the tubular body 1, and also the back face-cover 5 is disposed within the wall body 3 to form the heat radiation hole 2, whereby the heat radiation hole 2 provided through the back face portion becomes inconspicuous for better appearance. |
