ÖVERSIDAN wardrobe light strip has a sensor that switches the light on and off automatically when you open or close the door. It also has a switch but it's a really tinny one and it's not comfortably placed for frequent use.

I keep my 3D printer in a PAX wardrobe with these light strips and I like to have the door open when I'm printing. I created this part to easily turn off the light for long prints.

Just slide it on or off the sensor.

The second part is a stopper that can be mounted with a double tape.