Hi All,
My first post so sorry if I should add this somewhere else or if it is common knowledge.
I am happy to report that I have added a mi light as above to HE using the Yeelight integration.
It was super simple - I found the bulb in the Yeelight app on my phone : it showed up as a 'Mi Led Smart Bulb). I turned on the option for LAN control in the Yeelight phone app.
I then searched for it in the HE Yeelight integration - it was immediately discovered as a Yeelight: the mac address has the same OUI as the Yeelight I already have (Xiaomi Electronics).
Have done some basic tests with HE - changing colour, turning on / off - so far all good.
In New Zealand (230V) these are selling at under NZ$30 so an economical option..