It sounds like you are asking for something which is the opposite of what this particular thread is about. 
This thread is about a device which can sense the temperature color of the existing environmental light and then use that to control the settings of a smart bulb so it matches the outdoor light.
But it sounds like you want to do the opposite: you just want to set the color temperature of a lightbulb regardless of what is happening with the outdoor light.
If so, that’s actually very easy: you just have to buy a lightbulb which is adjustable for colour temperature. There are many of these models which work with smartthings, including some from Philips hue. Hue models with the word “ambiance” in the model name can adjust the white colour temperature from about 2700 K to about 6500 K. Phillips also calls this “warm to cool white.“
https://www.philips-hue.com/en-us/p/hue-white-and-color-ambiance-1-pack-e26/046677548483#features
But you can’t adjust the colour temperature on a lightbulb which is not designed for that.