I grow in—I grow out—I grow.

The large lighting interior object from an elderberry trunk found in the Křivoklát gorge.
The base is made of concrete. The height of the Trunk is about 2 m.
It has an extra low voltage electrical system (SELV), uses 12V.
It is connected to the mains via a 230V adapter. Shines gently in warm&cold white.
You can download the wiring diagram here.