The Two Trees of Valinor created by Yavanna were the source of illumination in Valinor. Being the luminaries of the natural origin the Trees were noted for their soft light, gentle dew and cycles of waxing and waning which led to the beginning of time measurement.
J. R. R. Tolkien created myths that strike with their beauty and depth. Aiming to make them the stories that could be believed in and that looked natural in his created world Tolkien surpassed most fantasy writers. The myth concerning the creation of Arda is among the most beautiful in the whole Legendarium.