What happens if a plant doesn't get light?
Most plants will have a hard time sustaining life without life. They can have nutrient deficiencies, underdevelopment issues, dehydration, issues with osmosis, or they can just die.
Plant uses light for many things; it is however a specialist in the feeding process of the plant - however the sunlight (a source of light), is soaked in through the plant's leaves; the leaves are the vital place where photosythesis happens. Therefore, a plant uses light in the process of photosynthesis.