Light energy is an integral aspect in the survival of nearly all organisms on Earth. In the absence of this physical phenomenon, human life on the planet would not be possible.
The natural light provided by the sun drives essential biological and chemical processes, such as photosynthesis. Light is a necessary component used by photosynthetic organisms to manufacture food and produce oxygen. The energy derived from the food produced through this process is the primary fuel of life.
The unique properties of light also enable animals, including humans, to perceive the world around them. Artificial light sources, such as lamps and bulbs, emit adequate light to illuminate objects in the dark and make them visible to the eye.