Types Of Lighting - Key Lighting

We recently learnt about different types of lighting and their effect, these are a huge contribution to the making of a film and its effects. One of these is Key Lighting, this is used and seen as displayed here;

This example shows key lighting. A Key light is the main light used in a filming set, it emphasises a characters appearance, it can be used in a 'hard' or 'soft' way, to focus or diffuse the light. It may stand either left or right of the camera. The use of this light will benefit our production by diffusing the light of a mafia character, maybe hiding, or in contrast a focused character, maybe to strike fear, or show power.