| 摘要 |
A 3-way reflector lamp includes a parabolic reflector (3) mounted on a 3-way lamp base having screw shell, a center contact and an intermediate contact. The reflector has its focus on its optical axis proximal end and extends in the distal direction. A first filament is connected to the screw shell and center contact, whereby light from the first filament is collimated by into a spotlight beam, and a second filament on the optical axis is spaced in the distal direction from the first filament and connected to the screw shell and an intermediate ring contact, whereby light from the energized second filament is diffused into a floodlight beam, and light from both energized filaments produces a spotlight beam within the floodlight beam.
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