Arabidopsis plants were grown under different colored lights to see how it affects their growth and flowering. They found that blue light makes the plants flower early, while red light delays flowering. The amount of blue light also affects leaf size and stem length. The plants responded differently to combinations of red, blue, and far-red light, with a specific ratio of blue light influencing flowering time. The study shows that light quality plays a significant role in Arabidopsis development, impacting when they flower and how they grow.