| 摘要 |
<p>PURPOSE: To obtain a lighting system, which can change the color temperature in a wide range without lowering luminous flux near both ends of a change range of color temperature and which can be downsized. CONSTITUTION: A lighting device is provided with an Hf fluorescent lamp 3D having high color temperature (for example 6700K), an Hf fluorescent lamp 3L having a low color temperature (for example 3000K), a color temperature variable control unit 1 for controlling the color temperature of the Hf fluorescent lamps 3D, 3L, and modulating stabilizers 2D, 2L for modulating and lighting the Hf fluorescent lamps 3D, 3L. Consequently, a lighting device, which can improve the illuminance with a small number of lamp and which can reduce the thermal influence to an adjacent high frequency lighting fluorescent lamp and which can reduce the lowering of the efficiency due to the thermal influence and which can lower the temperature of the tube wall of the lamp and which can be downsized, can be provided.</p> |
