| 摘要 |
PROBLEM TO BE SOLVED: To exercise the characteristics of a lamp itself in the state mounted on a lighting device by arranging a lighting circuit so that the temperature of the coldest part is at the lowest temperature even during lighting of the lamp. SOLUTION: This lighting device has the coldest part where temperature is the lowest when a lamp is lit in the state that the surrounding temperature is constant. A lighting circuit 1 of a fluorescent lamp is arranged in the position farthest from the coldest part of the lamp within the lamp lighting device so that the temperature of the coldest part becomes the lowest during lighting of the fluorescent lamp with the lighting device. The lighting circuit 1 is arranged in the position farthest from the coldest part A as shown in the figure. The lighting circuit 1 means a heating component not containing components such as a switch, a glow starter, or a socket, especially means a ballast, or an electronic ballast, or an inverter circuit. The lighting circuit 1 keeps the temperature of the coldest part 45 deg.C or lower during lighting of the fluorescent lamp. |
