| 摘要 |
<P>PROBLEM TO BE SOLVED: To reduce mounting space by always realizing little variation in brightness and maintaining the predetermined brightness in a luminaire surrounding temperature of 25°C to 40°C, even when the surrounding temperature of the luminaire body is varied. <P>SOLUTION: The luminaire body 1 is formed by a combination of a high frequency exclusive ring type fluorescent lamp 5 and a high frequency exclusive double ring type fluorescent lamp 6 with different temperature characteristics. As a result, even when the surrounding temperature of the luminaire body 1 is varied, the variation in brightness is made small and the predetermined brightness can be realized in a wide range of temperature. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
