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2. Nancy Holt - Wikipedia

   en.wikipedia.org/wiki/Nancy_Holt

   Solar Rotary is a work located on the campus of the University of South Florida in Tampa, Florida. The work, consists of 20 ft (6.1 m). aluminum poles topped with a swirl of metal called a shadow caster, which casts a circle of light on a central seat when it is solar noon on the day of the summer solstice.

3. Sundial - Wikipedia

   en.wikipedia.org/wiki/Sundial

   The rays of light that graze the tip of a gnomon, or which pass through a small hole, or reflect from a small mirror, trace out a cone aligned with the celestial poles. The corresponding light-spot or shadow-tip, if it falls onto a flat surface, will trace out a conic section, such as a hyperbola, ellipse or (at the North or South Poles) a circle.

4. Flagpole - Wikipedia

   en.wikipedia.org/wiki/Flagpole

   Flagpoles are usually made of wood or metal. Flagpoles can be designed in one piece with a taper (typically a steel taper or a Greek entasis taper), [2] or be made from multiple pieces to make them able to expand.

5. Light pillar - Wikipedia

   en.wikipedia.org/wiki/Light_pillar

   A light pillar or ice pillar is an atmospheric optical phenomenon in which a vertical beam of light appears to extend above and/or below a light source. The effect is created by the reflection of light from tiny ice crystals that are suspended in the atmosphere or that comprise high-altitude clouds (e.g. cirrostratus or cirrus clouds ). [ 1 ]

6. Solar traffic light - Wikipedia

   en.wikipedia.org/wiki/Solar_traffic_light

   Solar-energy-powered school traffic light Solar Panel Battery Enclosure on Traffic Light. Most solar traffic lights use LED lamps as they are more reliable [1] and have more advantages over other lighting devices like CFL lamps as they are more energy efficient, have a longer life span and turn on and turn off quickly. [2] Solar traffic lights ...

7. Solar symbol - Wikipedia

   en.wikipedia.org/wiki/Solar_symbol

   The solar disk, crescent Moon and stars as shown on the Nebra sky disk (c. 1600 BC) The basic element of most solar symbols is the circular solar disk. The disk can be modified in various ways, notably by adding rays (found in the Bronze Age in Egyptian depictions of Aten) or a cross.