This is because it has two functional sides, one to receive light and one to emit light.
During the day, the photovoltaic solar panel gathers light by the window side providing enough power for a few hours of soft light for the evening.
The construction is a composition of three main elements, a satin polypropylene housing, an acrylic lens and the ABS inner core, which holds the electronic components. The size is large enough to cast a pleasing amount of light while being small enough for a child to turn over with their hands.
Switch Light
Universal Program