| 摘要 |
Elevated airfield lighting device (10), comprising a main body (11) securable to a support (14) enabling the main body (11) to be fixed at an elevated position from ground (15), and at least one light unit (12, 13) comprising at least one LED (17), wherein the main body (11) encloses an electronic circuit for powering and driving the LED and comprises a first heat sink (110) thermally coupled to the electronic circuit and wherein the light unit comprises a second heat sink (120, 130) for dissipating heat generated by the LED. The lighting device (10) is characterised in that the light unit (12, 13) is formed as a separate body from the main body (11) and comprises a front (12, 132) for transmitting light emitted from the LED and a back comprising a rear surface at which the second heat sink is provided. The light unit is removably attachable to the main body, wherein when attached, the rear surface (120, 130) is interposed between the front and the main body and a fluid passage is formed between the main body (11) and the light unit (12, 13) where ambient air can pass so that the second heat sink can dissipate heat to the ambient air by natural convection. |
