| 摘要 |
An envelope comprises a bowl-shaped component with a screw base and a bulb of a translucent material. A fluorescent tube bent a plurality of times and a reactance ballast are encased in the envelope. This fluorescent tube and the reactance ballast are fixed to a supporting plate. The bend part of the fluorescent tube protrudes through the supporting plate toward the side of the bowl-shaped component. A plurality of openings are formed in the bowl-shaped component at parts corresponding to the bend part of the fluorescent tube. A plurality of openings are formed in the supporting plate at parts near the reactance ballast fixed to the supporting plate. |
