Answer:
The figurative language used in the sentence "You're the light which lets everyone shine" is a metaphor.
Step-by-step explanation
A metaphor is a figure of speech that compares two things without using "like" or "as." In this case, the speaker is comparing the person being addressed to a light. This metaphor suggests that the person being referred to is like a source of illumination, bringing brightness and allowing others to shine.
By describing someone as a "light," the speaker is implying that the person has a positive impact on others, enabling them to reach their full potential and succeed. The metaphor creates a vivid image and adds depth and emotion to the statement.