Night light dimmer

I have a few of this night lights all over my house. They are very cheap and very useful, as they light up automatically when it gets dark.
However, I have one of these on my newborn's room, and it's just a little too bright.
So I designed this adapter that clips onto the night light and blocks probably 50% of the light output.
The same result can be achieved with some dark tape, but since I have a 3D printer... why not?