| 摘要 |
An exemplary light fixture includes a holder, an envelope and a lamp body. The lamp body includes a heat dissipation portion, a light source and a shield. The heat dissipation portion has top and bottom ends connecting to the holder and the envelope, respectively. The light source is mounted on the bottom end of the heat dissipation portion and covered by the envelope. The heat dissipation portion includes a plurality of fins extending from the top end to the bottom end of the heat dissipation portion. A passage is defined between every two adjacent fins. The shield surrounds the fins and defines a plurality of windows therein, communicating with the passages.
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