### illumination | darkness | shade:

Lighter shade
* appear closer, and thus higher, to most people.
* correspond to large amplitudes and darker shades to small amplitudes.

Partial shade
* enhances foliage and flower color.
* is preferable in very hot climates
  - where an area is in full sun for part of the day and in shade for the rest
* leads to less foliage color and a more open growth habit.
* protects plants and flowers from extremes of hot and cold.

### illumination | darkness | shade:

Shadow
* All shadows have color.
* Most shadows reduce light.
* Some shadow play troupes are made up of singers, drum players and their assistants
  - shadows cause solar eclipse
* affect both diffuse and specular light, but a penumbra is an effect of diffuse light.
* always lie away from the light's origin.
* appear only on sunlit days.
* are an important element in aerial photography
  - another form of the figure which can take on a life of their own
  - bands
  - followers
  - heavy, and the transition of forms from shadow into light is startling
  - immune to sleep, charm, and hold spells and are unaffected by cold-based attacks
* are located in bridges
  - bright light
  - forests
  - ground
  - sunshine
  - longest at sunrise and sunset and in winter
  - presence
  - shortest at midday, when the sun is high in the sky
  - therefore an important, stereoscopic cue for depth perception
* are used for cooling
  - shades
* can be a guide to both direction and time of day
  - distort distances
  - eat people
  - serve as a bridge between visible and invisible worlds
* cast by clouds can influence fishing for speckled trout and redfish.
* change direction, depending upon the time of day.
* conceal large areas of a surface, creating sharp triangular patterns.
* exist under most conditions, day and night.
* give two-dimensional representation to three dimensional objects
  - visual cues regarding the depth and placement of objects
* grow and shrink according to the position of the sun.
* have shape and lightness.
* help to create the feeling of the unknown or that something is hidden.
* make objects appear to be on the ground rather than floating.
* never do more than outline or define the shape of things.
* provide images of body tissue through which X-rays pass.
* show clearly how the sun moves, so they can be used to tell time on a simple sundial.
* take form and noises have bodies
  - the shape of the object that blocks the light
  - various forms
* tend to be longer and days tend to be shorter during the winter months.
* work to define lighted areas.

### illumination | darkness | shade | shadow:

Dark shadow
* Most dark shadows reduce light.
* are clean black and the darker colors have fine color hues.
* cover their eyes and genitals.

Drop shadow
* are most often decorative in nature, working to enhance an image.
* can be colors other than black or gray.
* work well, e.g., to emphasize a photograph, letters or buttons.

Eye shadow
* are in grays, earthy browns, khaki greens and plums.
* contains mica.
* cosmetic that is applied on the eyelids and under the eyebrows.
* make eyes look prettier.
+ Eye makeup, Eye shadow: Cosmetics :: Body art
  * Eye shadow is a cosmetic that is applied on the eyelids and under the eyebrows. The average distance between eyelashes and eyebrows is twice as big in women as in men. Pale eye shadow visually enlarges this area and has a feminising effect.

Spook
* are television shows.
* have their own language.

Umbra
* are fish
* computer role-playing game written in Python.
* is the total shadow,penumbra the partial shadow
  - when the entire sun is blocked by the earth as seen from the spacecraft
* simple computer role-playing game, written in Python.

Spiritual darkness
* represents sin, evil, ignorance, decay, and death.
* wall, a wall that shuts out the light.