Lighting
* Most lighting depends on a physical change
  - is within a cloud or between clouds
* also causes plasma in the atmosphere.
* also has a role to play in security
  - an impact upon a photographic image
  - pays special attention to light levels in transition areas from shade to full sun
  - plays an important role in the ability of students to work efficiently
* can also help or hinder comfort and productivity
  - produce a reddish-brown feathery skin lesion which disappears in a few days
  - change everything
  - create, enhance, or destroy a visual environment
  - help allay fears after dark
  - increase or decrease the contrast of visual materials
* combination of art and science
  - engineering, science and magic
* comes in a variety of types such as light from the sun, indoor lighting, and spotlights.
* concern with the computers.
* destructive force and a spear weapon used to kill.
* fixes nitrogen, creates natural fertilizer.
* has a major effect on the body, mind and spirit
  - many positive effects on our community such as safety, security, and aesthetics
* improves visibility at night and thus greatly contributes to traffic safety.
* is also an important aspect in the growth of guppies
  - fundamentally related to the use of color and texure in the surfaces of a setting
  - important to keep breeding stock in production
  - one of the most common and economical ways to change a room's appearance
* is an important design aspect of home decor
  - element in the forming of the x-shape
  - another stimulant for egg laying in hens and aggressiveness in males
  - apparatus
  - associated both with activity and security
  - betters
  - by electricity
  - caused by excitation of atoms of gas in a bulb
* is controlled by electronic devices called dimmers
  - software to respond differently to large and small events
  - dim, even in operating theaters, for lack of bulbs
  - essential for reproduction in the winter months because of the length of the days
  - everything when it comes to a good photo, as well as, background
  - important for a sense of three-dimensionality and for emotional color
  - interior decoration
  - left on during the night to stimulated the birds to lay eggs
* is located in offices
  - most important when setting a mood of romance in a room or space
  - one element of environment for agriculture products
* is one of the major electricity consumers in a typical home
  - most important variables in photography
  - produced naturally
  - synonymous with romance
* is the future of automotive lighting
  - number one contributor to productivity
  - single largest electricity user in commercial buildings
  - twenty percent of American electricity use
  - used to show powerful shadows of the hills and of the rock
* is very important for normal growth and behavior
  - taking photographs of petroglyphs
  - visual music
  - what makes or breaks the visual element of a video
  - where the glow is
* large part of the energy equation, especially in commercial buildings.
* makes a big difference in how they appear.
* occurs when large amounts of electric charge flow between the clouds and the ground.
* particular problem when people suffer from the effects of glare.
* plays a critical role in industry
  - major role in determining our perception and experience of our surroundings
* powerful stimulus on behavior.
* primary consideration in both health and behavior.
* provides safety in a number of places.
* refers to the amount of available light.
* uses dramatic lighting effects to provide interest and visual attention.
+ Energy conservation, Energy efficiency trends in the United States, Commercial sector: Energy :: Engineering :: Environment
  * Energy in this sector has the same basic end uses as the residential sector, in slightly different proportions. Lighting is also generally the most wasteful component of commercial use. A number of case studies indicate that more efficient lighting and elimination of over-illumination can reduce lighting energy by approximately fifty percent in many commercial buildings.