Lighting can be implemented in many different ways to create different film effects. Lighting can be used in dramatic ways as well as to make visual puns or anything in-between.
The whole mood and feel of a scene can be changed depending on the light, for example:
(Richard Farnsworth in The Straight Story 1999)
This dull and gloomy setting is what would be described as a pathetic fallacy in literature as the weather reflects the mood of the people in the film.
Whale Rider (2002)
This is when the main source of light is from behind the character creating a silhouette. It can create a mysterious effect due to the effect of the shadows. This type of lighting is often used in horror films. The back light is placed behind the subject and lights it from the back. Rather than providing direct lighting (like the kay and fill), its purpose is to provide definition and subtle highlights around the subjects outlines. This helps separate the subject from the background and provide a three-dimensional look.

Key and fill lighting
The key light is the main light which is usually the strongest and has the most influence on the look of the scene. It is placed to one side of the camera/subject so that this side is well lit and the other side has some shadow. The fill light is the secondary light and is placed opposite of the key light, this is to fill the shadows in which the key has created.

Under-lighting
This is when the main source of light comes from below the character. It is often used in horror films to make characters look evil.
Top lighting
Top lighting can make a character look innocent because the "light of heaven" is shining down on them. Top lighting can also cast shadows on the lower section of the subjects body when needed.
Side lighting
This is when the main light source comes from one side of the screen in order to light one side of the characters face, producing shadows across set creating a sense of mystery.
Exposure
Another effect of lighting is exposure, this is the amount of light which is allowed into the camera. Over exposure in a shot can make the light look exaggerated and over brightened whereas under exposure will make the scene look darker than it actually is. A scene may be over exposed when a character has been into the dark and then let into the light they would want to over exaggerate so that the audience relates to the brightness the character will react to. Under exposure would be used when there is a dark scene and the audience often has to squint to be able to see whats going on, this again gives the audience a feel of what the character is feeling.
Another effect of lighting is exposure, this is the amount of light which is allowed into the camera. Over exposure in a shot can make the light look exaggerated and over brightened whereas under exposure will make the scene look darker than it actually is. A scene may be over exposed when a character has been into the dark and then let into the light they would want to over exaggerate so that the audience relates to the brightness the character will react to. Under exposure would be used when there is a dark scene and the audience often has to squint to be able to see whats going on, this again gives the audience a feel of what the character is feeling.




















