The deCONZ Daylight sensor is a special sensor built into the deCONZ software since version 2.05.12. It is represented in Home Assistant as a sensor called sensor.daylight. The sensor's state value is a string corresponding to the phase of daylight (descriptions below taken from https://github.com/mourner/suncalc, on which the deCONZ implementation is based):

| Sensor State | Description |

|--------------|-------------|

| sunrise_start | sunrise (top edge of the sun appears on the horizon) |

| sunrise_end | sunrise ends (bottom edge of the sun touches the horizon) |

| golden_hour_1 | morning golden hour (soft light, the best time for photography) |

| solar_noon | solar noon (sun is in the highest position) |

| golden_hour_2 | evening golden hour |

| sunset_start | sunset starts (bottom edge of the sun touches the horizon) |

| sunset_end | sunset (sun disappears below the horizon, evening civil twilight starts) |

| dusk | dusk (evening nautical twilight starts) |

| nautical_dusk | nautical dusk (evening astronomical twilight starts) |

| night_start | night starts (dark enough for astronomical observations) |

| nadir | nadir (darkest moment of the night, the sun is in the lowest position) |

| night_end | night ends (morning astronomical twilight starts) |

| nautical_dawn | nautical dawn (morning nautical twilight starts) |

| dawn | dawn (morning nautical twilight ends, morning civil twilight starts) |

The sensor also has an attribute called "daylight" that has the value `true` when the sensor's state is `golden_hour_1`, `solar_noon`, or `golden_hour_2`, and `false` otherwise.

These states can be used in automations as a trigger (e.g., trigger when a certain phase of daylight starts or ends) or condition (e.g., trigger only if in a certain phase of daylight).