The combination of light and time (two to two days, divided between day and night) uses light to express the passage of time, and at the same time reflects a natural phenomenon-divided between day and night.

At first, the idea was to combine time with light. At first, I thought of the 24 solar terms, but I couldn't go further after thinking about it for a long time. I looked for inspiration on the Internet and saw this geographical distribution map of day and night-two to two maps. I want to try here.

The light pole in the middle will swing up and down about 45 ° to symbolize the trajectory of a sun. (I wanted to be more rigorous and changed to 23 ° 26 ′, but the swing is too small and the effect is not obvious, so it is changed to 45 °)

When the light pole rotates to the corresponding solar term (four small lights), the small lights will shine, and the small lights are divided into two, representing the meaning of dividing the day and night.

The 12 light sources on the light pole represent 12 hours, and one light source is lit up in an hour. White and yellow are used to distinguish the morning and afternoon. White: 0-12; Yellow: 12-24.
Four solar term lamps and the light source of the large ring play the role of atmosphere lamp, white: 6-18; Yellow: 18-6.

The time scale above the light pole.