Default color and brightness in Bedside Lamp 2

Hello. I tried to set a default color and brightness of the lamp but when i turn off and turn on either using the button or the app for android the lamp turns the light with another set.
Furthermore if i change the color or the brightness (without setting default value) and turn off, when i turn on the lamp again doesn’t keep the last set.
Could you please tell me how can i set a default value?