Both pure and light are forms of **, but they differ significantly in their definitions.
Pure ** refers to those that do not rely on lyrics, but only express emotions and moods through the combination of instruments and arrangements. It does not need the assistance of lyrics, and completely relies on elements such as melody, rhythm, and harmony to convey emotions and thoughts. Pure ** is sometimes called "wordless**" because it does not have clear lyrics, but expresses emotions and moods through the elements of **.
Light refers to those with a light, pleasant theme, and is often used to relax the mind, reduce stress, or use as a background. Light ** is usually based on pop music, with beautiful melodies and bright rhythms, which can make people feel happy and relaxed. Light** can also be called "light**" or "light**" because it makes people feel relaxed and happy.
2. Features. 
The characteristic of pure ** is that it expresses emotions and artistic conception through the elements of **, and there are no clear lyrics, so it pays more attention to the melody, rhythm, harmony and other elements of **. Pure creation usually requires more in-depth literacy and skills, because it needs to express emotions and artistic conceptions more delicately.
Light** is characterized by its light-hearted, enjoyable theme, and is often used to relax the mind, reduce stress, or as a background**. The melody is beautiful and the rhythm is bright, which can make people feel happy and relaxed. Light creations usually need to be more concise and clear, because it needs to make people feel the pleasure quickly.
3. Application scenarios.
Pure** is often used in situations where you need to feel emotions and moods more deeply, such as film soundtracks, personal meditation or relaxation. Pure ** can help people better concentrate, reduce stress, and also help people better feel emotions and artistic conceptions.
Light ** is usually used in some occasions that require relaxation and pleasure, such as restaurants, cafes, bars, etc. Light ** can make people feel happy and relaxed, and at the same time, it can also add some vibe to the environment.
Fourth, summary. Although pure and light are both forms of **, there are obvious differences in their definitions, characteristics and application scenarios. Pure **focuses on melody, rhythm, harmony and other elements to express emotions and artistic conceptions, while light ** takes relaxation and pleasure as the theme, and is usually used to relax the mood, reduce stress or use as a background**. When choosing to use pure or light, you need to choose the appropriate form according to the occasion and needs.