Lighting in hydroponic Gardening by Diana Lighting plays an essential role in hydroponics gardening. Adequate indoor lighting is essential for plants to produce food and to survive. Lighting is the first thing that is taken into consideration when starting an indoor garden. The amount of light that is naturally available or that can be supplied by artificial means, determines which plants are ideal for an indoor garden. The amount of light entering any part of the house would vary from one location to another. The surroundings of the house such as trees, roof over hangings affect the amount of light entering through a window. A light meter that provides measures of photosynthetically active radiation (PAR) should be used to calculate the amount of light falling through the window. Plants require 400 and 700 nanometers of PAR for photosynthesis and chlorophyll production. Artificial lights for plants can be provided by using a variety of sources. These include incandescent bulbs, fl Read More Here