500 feet.
1 mile.
1 mile visibility and clear of clouds.
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.
Enough to fly to the first point of intended landing and to fly after that for 30 minutes at normal cruising speed.
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.
Sun lighting is the standard daylight lighting. Some light bulbs can imitate daylight.