Approx. 1.5m from the plug to the box where the strip is plugged in.

The WiZ are supported directly by homeassistant, no "diversions" via zigbee necessary. See here: https://www.home-assistant.io/integrations/wiz/

WiZ offers these LED strips as an extension: WiZ Colors (RGB)

This is the starter set including power supply. We will add a corresponding declaration in due course. Many thanks for the advice :).