Filtered light, also known as indirect light, refers to sunlight that has been softened or diffused by passing through a medium or obstruction, such as a sheer curtain or foliage. This type of light is characterized by its reduced intensity and the gentle, diffused glow it creates. The purpose of filtering the light is to mitigate the harshness of direct sunlight, preventing plants from being sunburnt and creating a more visually pleasing and comfortable lighting environment.