| 摘要 |
PURPOSE:To enable the light color of a lighting device to be continuously changed, by constructing a plurality of fluorescent lamps with different light colors in a fluorescent lamp of a large diameter. CONSTITUTION:In a glass tube 1 of a large diameter is provided a glass tube 2 of a small diameter. In the portion between the both glass tubes 1, 2 and in the glass tube 2 of a small diameter, are provided filaments 3 and sealed a gas including mercury. Onto inner faces of the glass tubes 1, 2 are applied respectively fluorescent materials of different luminous colors to construct a complex unit of two fluorescent lamps A, B which are separately dimmed by a dimmer device. |
