high key lighting

Today i learned something from my photography friends about what is "High Key Lighting". High Key Lighting actually is a style of lighting for photography that aims to reduce the lighting ratio present in the scene. This was originally done partly for technological reasons, since early film and television did not deal well with high contrast ratios, but now is used to suggest an upbeat mood. It is often used in sitcoms and comedies. High-key lighting is usually quite homogeneous and free from dark shadows. Below are some of the examples of high key lighting photos: