Little light - dark images, sometimes objects cannot be distinguished.
Light - there is enough light to see everything clearly
Too lighted - lighting is too intense and distinguishing objects can be difficult.
Angles can be of help when trying to give more or hide light. This only works when you cannot control the light source (sunlight). Using artificial lighting can also be of great use when trying to manipulate light.
In some photo-editors, you can also remove or give light to the photo, which is a very useful tool.
Hope it helped,
BioTeacher101