For a better understand we must to teach a look as itself,like energetic system.

As all in life creating with results of vibration, as vibration is result for move are ions around protons of every atom in every molecule of any substance in Space, but vibration having in vital and non vital material, as from  a vital she is very active and different, than in non vital, but she having on everywhere.
Sun light is need for eye, supporting for eyes healthy in a good condition, as strengthening for weak eyes, metabolism in theirs improving, cleaning organism from slags, as 80 percent of ultraviolet entering through eyes,and who wearing g;lasses often is delay in organism entering for rays, as causing for inside organs diseases, as all in glasses are chronic patients!

As color is color quality, if color apply on a waves sizes, we are getting different colors, as seven colors for rainbow are part of sun light spectrum color, as every color having a many of shadows and variations for shadows.