| 摘要 |
A flight navigation light device has a tall construction format, and is preferably a wind energy plant with at least one lighting device mounted on the construction. A brightness detector, or twilight switch, detects the daylight brightness in the surroundings of the building. This is connected with a switch device that evaluates the measured data and switches on the flight navigation lights when the ambient brightness has fallen below a predetermined level. A field of vision-measuring device activates the flight navigation lights when the field of vision has fallen below a predetermined amount. |
