Light sealing is a technique used to prevent unwanted light from entering a space, which can be crucial in various applications like photography, film production, and scientific experiments. This is often achieved through the use of specialized materials or structures that block or absorb light, ensuring that the desired lighting conditions are maintained. In photography, for example, light sealing is important in camera design to prevent stray light from affecting the image quality. Similarly, in laboratories, light sealing helps maintain controlled environments for sensitive experiments, ensuring that external light does not interfere with the results.