Half-light and Sunup

Half-light noun - A greyish light (as at dawn or dusk or in dim interiors).

Sunup and half-light are semantically related. in daybreak topic. In some cases you can use "Sunup" instead a noun phrase "Half-light".

Sunup noun - The first appearance of light in the morning or the time of its appearance.

Half-light and sunup are semantically related. Sometimes you can use "Half-light" instead a noun "Sunup".