Sunlight participates in the formation of chlorophyll, opens the stomata and helps in making food. The rate of photosynthesis increases when the amount of light increases up to a certain limit. However, if the amount of light is high, photosynthesis stops. Photosynthesis can be maximized by increasing the light from 100 foot candles to 3000 foot candles. If the light is continuous, photosynthesis can reach its maximum level in 10-12 hours. Violet, blue, orange and red light are mostly used in photosynthesis. The rate of photosynthesis is higher in red and blue light. However, as a single light, red light has the highest rate of photosynthesis. Scientists Hoover and Gabrielsen (1948) proved that photosynthesis occurs more in red light and less in green light.