Luminosity is the condition of being bright or of having light. Bright light brings out colors and contrast in landscapes. Objects seem to take on a life of their own. Aspen trees glow like gold during the afternoon autumn sun. Italian vineyards are radiant with red and yellow leaves. The blue sky is like lapis lazuli. The green cypress trees of the Val d'Orcia glow in the afternoon sun. Colorado mountains stan in full majesty.