Default state for RGB lights (lifx)

Dear all,

I have 20 lifx lights in my living/dining room on different circuits. Those circuits have still there original light buttons, but i have added a shelly device behind them so you van toggle using the original button or via HA.

Now I want to have a default (virtual) light item that I can set and whenever a lifx light comes online it pushes this state to it (or the whole lifx light group). (some button combos reset the lifx to their default state) I have something setup like this in node red to push this but the problem is the default light.

I use the MQTT json light at the moment but the problem is with the color temperature. The sliders do not mean the same thing on this virtual item and on my lifx lights. The minimum and max are different…

My lifx lights report:
min_mireds: 111
max_mireds: 400

MQTT light reports:
min_mireds: 153
max_mireds: 500

And I guess that this is why the slider on the lifx lights at 20% is 30% at the MQTT light.
I do not seem to be able to set the min and max for MQTT.

Or does anyone have a better Idea to keep several light at the same setting?

Best regards,
Wouter