Daylight

This includes direct sunlight, diffuse sky radiation, and (often) both of these reflected by Earth and terrestrial objects, like landforms and buildings.

Sunlight scattered or reflected by astronomical objects is generally not considered daylight.

Daylight is present at a particular location, to some degree, whenever the Sun is above the local horizon.

It may be darker under unusual circumstances like a solar eclipse or very high levels of atmospheric particulates, which include smoke (see New England's Dark Day), dust,[1] and volcanic ash.

[2] For comparison, nighttime illuminance levels are: For a table of approximate daylight intensity in the Solar System, see sunlight.