| 摘要 |
The invention relates to a fluorescent lamp (1) adapted for cold environments, which comprises an elongated main tube (11), fixing devices (12) at each end of the fluorescent lamp (1) for fixing the fluorescent lamp (1) in a light fitting (27), two electrodes (15) placed inside the main tube (11), a heat-insulating outer tube (20) that surrounds the main tube (11) and creates an airspace (22) between the main tube (11) and the outer tube (20). Each fixing device (12) comprises an end cap (41) with a radial part (41b), that delimits an outer end plane of the fluorescent lamp (1), and with an axial peripheral part (41a), that is connected to an end of the outer tube (20). An axial spacer (29, 31) with low heat conductivity has a first end part (33) that is connected to an end (34) of the main tube (11) and a second end part (38) that adjoins the outer end plane and keeps the main tube (11) separate from the end cap (41) in order to reduce the transmission of heat from the main tube (11) to the end cap (41) and the outer tube (20).
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