Meet Lixie: an open alternative to the Nixie Tube that can display any numeric information. You can use it to display the time, temperature, and more. Lixie is based on WS2812B LEDs. You can chain as many of these as your power supply can handle. Lixie has open source hardware and software.
You may also want to see:
Simply bring your own micro-controller, and you are set. You can use something like this to display YouTube views, website visits, sales, and more.
**Disclaimer: Our posts may feature aff links. As an Amazon Associate, we earn from qualifying purchases. Please read our disclaimer on how we fund this site.