| 摘要 |
<p>An airport lighting device (10) includes a light pipe (12) and a tungsten halogen reflector lamp (14) transmitting light beams parallel with the axis of the light pipe (12). This allows the use of a dichroic filter which provides for an increased transmission whereby low wattage lamps (36w) can be used instead of the more usual 100 to 200w light sources. A number of shaped prisms can be used as end arrangements whereby different effects are obtained, for example, bi-directional, omni-directional or angled beams can be provided.</p> |
