core/homeassistant/components/smlight/icons.json

{
  "entity": {
    "sensor": {
      "device_mode": {
        "default": "mdi:connection"
      },
      "firmware_channel": {
        "default": "mdi:update"
      },
      "zigbee_type": {
        "default": "mdi:zigbee"
      }
    }
  }
}