| 摘要 |
<p>PURPOSE:To prevent a sense of uneasiness from being given to a user of lighting even if a fluorescent lamp and an incandescent lamp are switched off simultaneously by arranging a circuit to control a fluorescent lamp lighting circuit and an incandescent lamp lighting circuit. CONSTITUTION:A circuit 5 to control a fluorescent lamp lighting circuit 2 and an incandescent lamp lighting circuit 4 has a fading function to light and turn off the lamp gradually in a certain constant time when a fluorescent lamp light source 1 and an incandescent lamp light source 3 are lighted and switched off. When the fluorescent lamp light source 1 and the incandescent lamp light source 3 are switched off simultaneously, control is carried out so that the fluorescent lamp light source 1 turns off earlier than the incandescent lamp light source 3. Thereby, even if the fluorescent lamp light source 1 is switched off at low dimming lighting time, since the incandescent lamp light source 3 is being faded, fade-out can be carried out gradually in an excellent atmosphere as a whole, so that a sense of uneasiness is not given to a user.</p> |
