MQTT State get default values

Hello,

I am new to MQTT and try to communicate from my device to home assistant (and the other way).
The device i have is an RGB+CCT light.

In home assistant, i added these lines:

mqtt:
  light:
    - name: "Light"
      command_topic: "mqtt/light/state"
      color_temp_command_topic: "mqtt/light/temperature"
      brightness_command_topic: "mqtt/light/brightness"
      rgb_command_topic: "mqtt/light/rgb"

In home assistant, i can turn on and off the lights, change colors (rgb) and change temperature. The only problem i have is when i restart the light. As soon as i turn on the light (update the state), i only get the “on” of “off” state, but no values.

How can i “read” the current values from Home Assistant on boot?