| 摘要 |
PURPOSE:To produce a comfortable atmosphere conforming with the mentality of human beings by providing a control means for varying color temperature level as setting the color temperature high at the time of full lighting of a fluorescent lamp and low at the time of light control. CONSTITUTION:A control means is formed of a volume Vr, a capacitor C3, an astable multivibrator 5, and a monostable multivibrator 6, and it increases the value of the volume Vr to input a signal having a large duty ratio at the time of full lighting, and reduces the value of the volume Vr to input a signal having a small duty ratio at the time of light control. Thus, the output of a fluorescent lamp 1 having a high color temperature is increased at the time of full lighting, so that the total color temperature is also increased. Conversely, as the output of the lamp 1 is reduced at the time of light control, the total color temperature is lowered. Hence, at the time of full lighting a cool feeling can be produced by increasing the color temperature and at the time of light control, a warm feeling can be produced by reducing the color temperature. |
