https://www.zigbee2mqtt.io/devices/929003823101.html

New lights are automatically in pairing mode. Factory resetting a Hue light can be accomplished in 6 ways which are described below. After resetting the light will automatically connect.

• In Hue App löschen
• Mit Lichtschalter
  • Repeat 5 times, starting with the bulb on:
    Turn off for 2 seconds, turn on for 8 seconds
    The light will pulse when factory reset and allow joining on Z2M