Cave and Light
To create this project and develop an idea I needed to understand what is it brightness exactly, so i did a research and came up with this explanation: "Brightness / (relative) Luminance
Brightness is an attribute of our perception which is mainly influenced by a color's lightness. This is probably why brightness and lightness are often mixed up. Brightness is not a color property, if used "correctly".
For one color of specific hue the perception of brightness is also more intense, if we increase saturation. A higher level of saturation makes a color look brighter.
In relation to other colors the brightness intensity of a color is also influenced by its hue. We can then speak of (relative) luminance to refer to brightness. "