A painted Crookes Radiometer of the series of harmony as olive to hanging, decorated with the motive of the series of Christmas represents a special decoration idea provided with a physical background. The function of a light mill is essentially based on the temperature differences at the bright and the dark side of the rotor in the vacuum. They receive a classical painted clear glass radiometer. They can select different sizes and colors.

They buy a German product of the mark directly from the manufacturer.