tuya-local/custom_components/tuya_local/devices/rgbw_lightbulb.yaml

name: RGBW lightbulb
products:
  - id: cqekgipywslyavsr
    manufacturer: Merkury
    model: BW904
  - id: p2i2oapbnxftdukj
    manufacturer: Merkury
    model: BW904
entities:
  - entity: light
    dps:
      - id: 1
        type: boolean
        name: switch
      - id: 2
        name: color_mode
        type: string
        mapping:
          - dps_val: white
            value: white
          - dps_val: colour
            value: hs
      - id: 3
        name: brightness
        type: integer
        range:
          min: 25
          max: 255
      - id: 5
        name: rgbhsv
        type: hex
        format:
          - name: r
            bytes: 1
          - name: g
            bytes: 1
          - name: b
            bytes: 1
          - name: h
            bytes: 2
            range:
              min: 0
              max: 360
          - name: s
            bytes: 1
            range:
              min: 0
              max: 255
          - name: v
            bytes: 1
            range:
              min: 0
              max: 255
      - id: 6
        name: scene
        type: hex
        optional: true
      - id: 7
        name: flash_scene1
        type: hex
        optional: true
      - id: 8
        name: flash_scene2
        type: hex
        optional: true
      - id: 9
        name: flash_scene3
        type: hex
        optional: true
      - id: 10
        name: flash_scene4
        type: hex
        optional: true