Poor lighting can be a safety hazard - misjudgment of the position, shape or
speed of an object can lead to accidents and injury.

Poor lighting can affect the quality of work, specifically in situation where
precision is required, and overall productivity.

Poor lighting can be a health hazard - too much or too little light strains
eyes and may cause eye discomfort (burning, etc.) and headaches.

Poor lighting can cause several problems such as:

• - Insufficient light - not enough (too little) light for the need.
  
• - Glare - too much light for the need.
  
• - Improper contrast.
  
• - Poorly distributed light.
  
• - Flicker.

A concise document presented by the Canadian Centre for Occupational Health and
Safety summarizes general ways to detect and solve some of the more common
lighting problems.

Further Information:

AplusA-online.de - Source: Canadian Centre for Occupational Health and Safety