In Use Signs - Various

(See my "On Air" sign for an example of one lit up)

This sign is intended to be lit up to warn others that a room is "In Use" or occupied. Such as for outside a darkroom door.

We haven't figured out the electronics yet. Planning to use something like a WS2812b LED with a wifi microcontroller. "Hey Cortana, I'm recording now!" (or something like that).

Temporarily, we stuck a couple christmas tree lights inside, connected to a wall switch inside the room.

There are 2 and 3 sided wa