At my workplace we have a dedicated room to record Skype conferences and other things.
To minimize the noise I was commissioned to build a simple light up sign that's easy to use.
The letters are cut out using my CNC and inside are 5 m of LED stripes connected to a RF controller.
This means all the electronics are hidden from sight and everything can be controlled remotely.
For those interested I also compiled a short video outlining the build process.