Sense Hub-Meaning of Lights

I’ve been searching but can’t seem to find any information that would tell me what each of the three lights on the top of the hub represent. Assume that they are for network connection, maybe sensors or battery but can’t find details anywhere. Sometimes my hub goes offline and would be nice to know what the lights indicate so I could possibly troubleshoot things better.

Any ideas?

still blinking 40 minutes later after unplugging it
I can get it to ask to activate too. I tried to do

Some reboot
still lighting up unplugged