I thought this was good knowledge to post.
I couldn't find the info immediately, so here's something that I found out while messing with the Hue App.
Let me know if this is covered somewhere else.
Background, I finally got a Hue Bridge but I have one Hue bulb directly paired with HE.
As far as I know if I deleted the bulb in HE just like in ST the bulb would be stuck in limbo, not knowing to join another Zigbee network.
Playing around with the Hue app I noticed when going to add a bulb you can manually specify a serial number:
I had to go and find the serial number but after adding it and fighting with auto-correct it found it and I guess stole it from Hubitat.
I hope this helps somebody in a similar situation.
Keith