| 摘要 |
PROBLEM TO BE SOLVED: To offset the noise components from adjacent circular fluorescent lamps and suppress radiation noises and line noises when multiple circular fluorescent lamps are used by feeding lamp currents to all lamps in the same direction. SOLUTION: Three first circular fluorescent lamps 5a are arranged on nearly the same plane along the peripheral edge of a luminaire main body 1 by the first lamp fitting means 2, and the second circular fluorescent lamp 5b is arranged at the center of the luminaire main body 1 by the second lamp fitting means 3. Since lamp currents are fed to all of lamps 5a, 5b in the same direction, the discharging directions at the portions of the bulbs 6 of the lamps 5a, 5b adjoining on the same plane are made equal. The noise components such as near infrared rays radiated from positive are columns can be offset, and radiation noises and line noises can be suppressed. |
