1 mile visibility and clear of clouds.
500 feet.
In daylight and good visibility, yes. Otherwise, no. In many places it is also illegal.
it indicates that the airspace surrounding that airport (5nm) is IFR and that VFR ops are not authorized.
Hawaii is relatively close to the equator with minor changes to daylight because of season. Daylight savings would complicate international business and tourists, with no added benefit. Arizona has determined the twice a year time changes complicate business operations without energy savings or any other benefit. Energy loss may actually occur because of increased use of residential air conditioning. Overall, daylight savings are not uniformly observed internationally. Most countries do not observe daylight saving time as the US does. Countries that observe daylight saving time do not all change their clocks on the same days or time. Operating on standard time and ignoring daylight saving time simplifies transactions in the global economy.
To save daylight
We're burning daylight, boys. The daylight is fading fast.
daylight-saving time
The sun is the source of daylight.
To save daylight
Daylight saving time starts in spring. I can't wait for daylight to go outside and play.
Some places require the headlights to be on whenever the vehicle is used. Apart from that, when daylight drops or when rain, snow or fog reduces visibility. And remember that the lights not only help you see where you are going, they help other drivers see you.
Tests at the University of California concluded that either blue or yellow is the best color for car safety. Blue shows up best during daylight and fog; yellow is best at night. The worst color from the visibility standpoint is gray. In another study by Mercedes-Benz in Germany, white ranked the highest in all-around visibility, except in situations of completely snow-covered roads or white sand. In such extremes, bright yellow and bright orange ranked second and third respectively in visibility. The least visible car color in the Mercedes test was dark green.