Clear and definite distinction

The difference between these two words is as follows:

1, sunny is generally used to describe the situation that there are no clouds or few clouds in the sky. For example, the weather is clear and sunny, there is no smog and no precipitation, and the sun and stars in the sky can be seen clearly.

2. Brightness can describe the bright weather and strong light, which means that there is enough light and there is no cloud cover, so you can easily see the surrounding objects. Besides describing the weather, clarity can also be used to describe clear and concise thinking or expression.

Sunny focuses on the sunny and bright weather, while bright emphasizes the sufficiency of light and the clarity that can be seen.