I have installed some Namron Spots [Namron Zigbee LED Pære 4,8W CCT GU10] using Zigbee2MQTT. Color temperature according to specs are 2200-5000K. As installed the span is 2700-5000K - controllable by Standard - or Mushroom cards. Connected to Hue Bridge they have a controllable span 2200 - 5000K.
Using a script or an automation i HA I can set the ColorTemperature to 2200 (and it works).
Is it some way to extend the span - either by modifying the dashboard cards - or by modifying the loaded Zigbee2MQTT configuration/data