noun
plural -lights
[noncount] :the light of the sun and sky during the day :the natural light of day
[noncount] the time of day when the sky is light
the time of day when sunlight first begins to appear
[noncount] informal :distance or difference between people or things
daylights [plural] informal
To scare/frighten the (living) daylights out of someone is to frighten someone very much.
To beat/kick/knock the (living) daylights out of someone is to hit or kick someone very badly.