Little seeds, big questions

How does the amount of light affect plant growth?

I used the same type of seed, soil, and water. Change one thing: light, and measured growth at regular intervals.

There was an increased changes in the plant under sunlight while the one the shade starting showing signs of browning and little growth

Sun light was the only difference, I could tell that exposure to sun light was necessary for the growth the plant while sunlight absence was killing the plant

I will like to reverse the process, to test plants that are known to do well in shades and measure different exposures of sunlight to the plant