Light exposure refers to the amount of light that reaches a surface or an object. It is an important factor in various fields, including photography, agriculture, and health. Different types of light, such as natural sunlight and artificial light, can affect how we perceive colors and how plants grow. In terms of health, light exposure plays a crucial role in regulating our circadian rhythms, which are the natural cycles that govern sleep and wakefulness. Adequate exposure to daylight can improve mood and energy levels, while insufficient light can lead to issues like seasonal affective disorder (SAD).