| 摘要 |
A heat shielded fluorescent lamp, consisting of lamp tube (1), ballast (2), ballast housing (3) and standard lamp base (4), characterized in that the lamp tube (1) is covered by a transparent or translucent envelope (5), the cavity inside the envelope (5) under a vacuum, and the envelope (5) is sealed and tightly fixed onto the lamp ballast whereas the air pressure inside the envelope (5) is below 100 mHg. The invented fluorescent lamp can separate itself from the heat outside, and can therefore produce higher light output under normal temperature as well as under low temperature. <IMAGE> |
