cinema_light_brightness.yaml

blueprint:
  name: Cinema light brightness
  description: Adjust light brightness when media is playing/paused/stopped
  domain: automation
  source_url: https://github.com/home-assistant/core/blob/dev/homeassistant/components/automation/blueprints/motion_light.yaml
  input:
    media_player_entity:
      name: Media Player
      selector:
        entity:
          domain: media_player
    light_entity:
      name: Light
      selector:
        entity:
          domain: light
    paused_brightness:
      name: Paused light brightness
      description: Light brightness when media is paused/stopped
      default: 100
      selector:
        number:
          min: 0
          max: 100
          unit_of_measurement: "%"
          mode: slider
          step: 1
    paused_transition:
      name: Paused light brightness transition
      description: Light brightness transition when media is paused/stopped
      default: 10
      selector:
        number:
          min: 0
          max: 30
          unit_of_measurement: seconds
          mode: slider
          step: 1
    playing_brightness:
      name: Playing light brightness
      description: Light brightness when media is playing
      default: 10
      selector:
        number:
          min: 0
          max: 100
          unit_of_measurement: "%"
          mode: slider
          step: 1
    playing_transition:
      name: Playing light brightness transition
      description: Light brightness transition when media is playing
      default: 1
      selector:
        number:
          min: 0
          max: 30
          unit_of_measurement: seconds
          mode: slider
          step: 1
mode: restart
trigger:
  - platform: state
    entity_id: !input media_player_entity
    from: playing
  - platform: state
    entity_id: !input media_player_entity
    to: playing
  - platform: state
    entity_id: !input light_entity
condition:
  - condition: state
    entity_id: !input light_entity
    state: 'on'
action:
  - choose:
      - conditions:
          - condition: state
            entity_id: !input media_player_entity
            state: playing
        sequence:
          - service: light.turn_on
            data:
              brightness_pct: !input playing_brightness
              transition: !input playing_transition
            entity_id: !input light_entity
    default:
      - service: light.turn_on
        data:
          brightness_pct: !input paused_brightness
          transition: !input paused_transition
        entity_id: !input light_entity