I have a blink(1) USB dongle. It's neat, you can use an app to change the colour on the indicator or, better, you can plug it in with other apps for them to change the colours. For a while I had my Cisco Jabber softphone linked to it so my coworkers could see when I was on the phone. But then OS X changed how the server logs worked and I couldn't follow the status changes anymore. However, working from home more people are using Teams to talk than the softphone. So to scratch an itch over lunch I grabbed a Microsoft Graph token, connected that to my blink(1) with some PHP, and now the light shows my Teams Status. Which works rather well for letting my homeworkers know when I'm on a call or busy or available. And it's pretty.