Group a warm and a cold light - to add a color temp balance slider

Configuration
1

I have a light strip containing warm leds and cold leds. Unfortunately the driver does not allow me to combine the two color temps as one light so I can easily set the color temp of the light strip as one. Is there a way to combine these two lights as one (with a light template or light group)? I tried my best but I can’t find a solution…

2

Still searching for a way to do this, maybe with a “light template” to create a third light out of these two?

3

I tried something like that a while ago. I don’t think I ever made it work really well, only sort of. I found some old config. But I warn you, it might be total trash ^^.

configuration.yaml

Summary 
light:
  - platform: template
    lights:
      test_n_w_lights:
        level_template: "{{ (state_attr('light.light_29', 'brightness'), state_attr('light.light_3_2', 'brightness')) | max  }}"
        value_template: "{{ states('light.corner_lights') }}"
        temperature_template: >-
            {% if state_attr('light.light_3_2', 'brightness')|int == 0 
              and state_attr('light.light_29', 'brightness')|int > 0 %}
              370
            {% elif state_attr('light.light_3_2', 'brightness')|int > 0 
              and state_attr('light.light_29', 'brightness')|int == 0 %}
              161
            {% elif state_attr('light.light_3_2', 'brightness')|int > 0 
              and state_attr('light.light_29', 'brightness')|int > 0 %}
              {{  ((
                  (state_attr('light.light_3_2', 'brightness')|int / 255*100) | round(0) | int 
                  / ((state_attr('light.light_29', 'brightness')|int / 255*100) | round(0) | int 
                  + (state_attr('light.light_3_2', 'brightness')|int / 255*100) | round(0) | int)
                  ) * 161 
                  +
                  (
                  (state_attr('light.light_29', 'brightness')|int / 255*100) | round(0) | int 
                  / ((state_attr('light.light_29', 'brightness')|int / 255*100) | round(0) | int 
                  + (state_attr('light.light_3_2', 'brightness')|int / 255*100) | round(0) | int)
                  ) * 370) | round(0)
                  }}
            {% endif %}
        turn_on:
          service: light.turn_on
          data:
            entity_id: light.corner_lights
        turn_off:
          service: light.turn_off
          data:
            entity_id: light.corner_lights
        set_level:
          service: script.corner_lights_level
          data_template:
            brightness: "{{ brightness | int }}"
        set_temperature:
          service: input_number.set_value
          data_template:
            value: "{{ color_temp }}"
            entity_id: input_number.temperature_input

scripts.yaml

Summary 
corner_lights_level:
  sequence:
    - service: light.turn_on
      data_template:
        entity_id: light.light_29
        brightness: >-
          {% if state_attr('light.test_n_w_lights', 'color_temp')|int > 265 %}
            {{ brightness }}
          {% else %}
            {{ ((161*(brightness|int) - state_attr('light.test_n_w_lights', 'color_temp') * (brightness|int) ) 
                  / (state_attr('light.test_n_w_lights', 'color_temp') - 370) ) | round(0) }}
          {% endif %}
    - service: light.turn_on
      data_template:
        entity_id: light.light_3_2
        brightness: >-
          {% if state_attr('light.test_n_w_lights', 'color_temp')|int <= 265 %}
            {{ brightness }}
          {% else %}
            {{ ((370*(brightness|int) - state_attr('light.test_n_w_lights', 'color_temp') * (brightness|int) ) 
                  / (state_attr('light.test_n_w_lights', 'color_temp') - 161) ) | round(0) }}
          {% endif %}
    # - service: input_number.set_value
    #   data_template:
    #     entity_id: input_number.corner_light_brightness
    #     value: "{{ brightness }}"
    # - service: input_number.set_value
    #   data_template:
    #     entity_id: input_number.corner_light_brightness2
    #     value: "{{ ((370*(brightness|int) - state_attr('light.test_n_w_lights', 'color_temp') * (brightness|int) ) 
    #               / (state_attr('light.test_n_w_lights', 'color_temp') - 161) ) | round(0) }}"
    # - service: input_number.set_value
    #   data_template:
    #     entity_id: input_number.corner_light_brightness3
    #     value: "{{ ((161*(brightness|int) - state_attr('light.test_n_w_lights', 'color_temp') * (brightness|int) ) 
    #               / (state_attr('light.test_n_w_lights', 'color_temp') - 370) ) | round(0) }}"