ha-yeelight-group2

light:
  - platform: "yeelight"
    devices:
      yeelight1:
        name: "myyeelight1"
        transition: 1000
      yeelight2:
        name: "myyeelight2"
        transition: 1000
      yeelight3:
        name: "myyeelight3"
        transition: 1000
  - platform: "grouped_light"
    name: "kitchen"
    entities:
      - light.myyeelight1
      - light.myyeelight2
      - light.myyeelight3

group:
  yeelightcuisine:
    view: yes
    entities:
      - light.kitchen