Allow color_mode to be processed in Kelvin for MQTT template light (#…

…36539)

* Allow color_mode to be processed in Kelvin for MQTT template light

* Add color_temp_kelvin documentation

source/_integrations/light.mqtt.markdown

@@ -978,16 +978,21 @@ brightness_template:
   description: "[Template](/docs/configuration/templating/#using-templates-with-the-mqtt-integration) to extract brightness from the state payload value. Expected result of the template is an integer from 0-255 range."
   required: false
   type: template
+color_temp_kelvin:
+  description: "When set to `true`, `command_topic` will publish color mode updates in Kelvin and process `state_topic` will process state updates in Kelvin. When not set the `color_temp` values are converted to mireds."
+  required: false
+  type: boolean
+  default: false
 color_temp_template:
-  description: "[Template](/docs/configuration/templating/#using-templates-with-the-mqtt-integration) to extract color temperature from the state payload value. Expected result of the template is an integer representing mired units."
+  description: "[Template](/docs/configuration/templating/#using-templates-with-the-mqtt-integration) to extract color temperature from the state payload value. Expected result of the template is an integer. If `color_temp_kelvin` is `true` the expected value is in Kelvin else mireds are expected."
   required: false
   type: template
 command_off_template:
   description: "The [template](/docs/configuration/templating/#using-templates-with-the-mqtt-integration) for *off* state changes. Available variables: `state` and `transition`."
   required: true
   type: template
 command_on_template:
-  description: "The [template](/docs/configuration/templating/#using-templates-with-the-mqtt-integration) for *on* state changes. Available variables: `state`, `brightness`, `color_temp`, `red`, `green`, `blue`, `hue`, `sat`, `flash`, `transition` and `effect`. Values `red`, `green`, `blue`, `brightness` are provided as integers from range 0-255. Value of `hue` is provided as float from range 0-360. Value of `sat` is provided as float from range 0-100. Value of `color_temp` is provided as integer representing mired units."
+  description: "The [template](/docs/configuration/templating/#using-templates-with-the-mqtt-integration) for *on* state changes. Available variables: `state`, `brightness`, `color_temp`, `red`, `green`, `blue`, `hue`, `sat`, `flash`, `transition` and `effect`. Values `red`, `green`, `blue`, `brightness` are provided as integers from range 0-255. Value of `hue` is provided as float from range 0-360. Value of `sat` is provided as float from range 0-100. Value of `color_temp` is provided as integer representing mired or Kelvin units if `color_temp_kelvin` is `true`."
   required: true
   type: template
 command_topic:
@@ -1069,10 +1074,20 @@ json_attributes_topic:
   description: The MQTT topic subscribed to receive a JSON dictionary payload and then set as sensor attributes. Usage example can be found in [MQTT sensor](/integrations/sensor.mqtt/#json-attributes-topic-configuration) documentation.
   required: false
   type: string
+max_kelvin:
+  description: The maximum color temperature in Kelvin.
+  required: false
+  type: integer
+  default: 6535
 max_mireds:
   description: The maximum color temperature in mireds.
   required: false
   type: integer
+min_kelvin:
+  description: The minimum color temperature in Kelvin.
+  required: false
+  type: integer
+  default: 2000
 min_mireds:
   description: The minimum color temperature in mireds.
   required: false