Brightness refers to how much light something emits or reflects.
When we talk about brightness, we usually think about light. For example, when someone asks if your new LED bulbs are bright enough, they mean do they shine a lot of light? On the other hand, if you describe a sunny day as very bright, you're saying it's full of sunlight. In design and art, people often talk about brightness in terms of colors - how vibrant or dull they appear to the eye. A bright color is one that stands out, while a muted one blends into the background. In photography, adjusting the brightness of an image can change its overall look and feel.
The quality of being bright.
