Lingting

There are 2 main types of lighting are often used by photographers, namely:
High Key is a scene that looks more inclined to bright. The effects of high key lighting is relatively little a shadow, but it is important also some dark parts as that is not an indication that the high key over exposed.
Low Key is the opposite, just the part - the part that subjects given sufficient light, while the - the other in the dark shadows. It often happens also to get the misconception that low key effect is to make the under-exposed, the correct ratio is the ratio between dark and light.