Consider the following when planning the lights in your scene.
         
          
            The purpose of light sources
            
 
            Character or object illumination typically includes the following lights:
            
 
               - A key light is the main light that illuminates the character or object. For outdoor scenes in the real world, the key light is generally
                  the sun.
               
- A secondary light, often called a fill light because it fills in dark areas. 
               
-  Backlights, if necessary, to distinguish the character or object from the background. 
               
 
          
            The characteristics of light sources
            
 
            Consider the following characteristics of a light source when planning your scenes.
            
 
             
               Softness or hardness
               
 
                Hard light produces sharp shadow lines. Hard light sources typically include light bulbs, bright sun, and flash lights.
               
 
               Soft light is diffused and produces soft edges. Soft light sources typically include light shining through fabric (like drapes),
                  reflected light, or sunlight diffused through clouds. 
               
 
              
             
               Color
               
 
                Color and temperature are closely related. A red spot light shining on a blue object may make it look black. Some common objects,
                  like street lamps may be tinted yellow. 
               
 
              
             
               Temperature
               
 
                Soft orange light feels warmer than blue-green light.
               
 
              
             
               Intensity
               
 
               The intensity of a light source is how bright it is. For example, bright high-noon sunlight usually is more intense than a
                  small electronic LED. The intensity with which a light illuminates a subject appears to lessen (or decay) as the subject moves
                  farther away from the light.
               
 
              
             
               Movement
               
 
               Lighthouse lights rotate. Flashlights might swing from a rope.