| 摘要 |
A lighting device (1) comprising a lamp (10) for emitting light and a concave reflector (20) accommodating said lamp. The reflector has a neck part (21), a reflective part (22) and a light emission window (23). The reflective part has an outer surface (24). A transversal, transparent front plate (25) is provided at the side of the light emission window. A metal housing (30) having a wall (31) is provided around said reflector. At least 50%, preferably at least 70%, of the outer surface of the reflective part is clad by the wall of the metal housing. The transparent front plate may be arranged in an extension part (35) of the housing and can be tilted with respect to the light emission window axis at an angle α in the range of 2° to 25°, preferably in the range of 4° to 10°.
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