lamp-follows-switch.yml

blueprint:
  name: Lamp Follows Swicth
  description: Turn on or aff a lamp every time a switch state changes
  domain: switch
  input:
    master_switch:
      name: the Master Switch
      description: This sensor will be synchronized with the light.
      selector:
        entity:
          domain: switch
    target_light:
      name: follower
      description: The lights to keep in sync.
      selector:
        target:
          entity:
            domain: switch

trigger:
  - platform: state
    entity_id: !input master_switch

action:
  - service: >
      {% if trigger.to_state.state == "on" %}
        light.turn_on
      {% else %}
        light.turn_off
      {% endif %}
    target: !input target_light