| 摘要 |
<p>PURPOSE:To prevent an erroneous use by forming a projection at least to one side of the base of a linear tube type fluorescent lamp of a different property, or the socket of an exclusive instrument of the fluorescent lamp, and providing a recess to receive the projection to the other side. CONSTITUTION:At least to one side of the base 27 of a linear tube type fluorescent lamp 20 of a different property, or the socket of an exclusive instrument of the fluorescent lamp 20, a projection 21 is formed, and a recess 22 to receive the projection 21 is provided to the other side. As a result, by fitting the projection 21 and the recess 22, the linear tube type fluorescent lamp 20 of a different property can be installed to the exclusive instrument. Consequently, an erroneous installing of plural different property of lamps such as lamps of different diameters, or a stabilyzer lighting type fluorescent lamp and a high-frequency lighting type fluorescent lamp, to an instrument other than their exclusive instruments, can be prevented, and furthermore, a trouble of losing the lighting ability, a heating of circuit parts, or the like can be also prevented.</p> |
