Seen the Light was created on 2003-01-27.
Never Seen the Light of Day was created on 2007-10-22.
Have You Seen Her was created in 1971.
The answer to the riddle is "shadow." A shadow can be seen in the dark when illuminated by a light source, and it is a part of you as it is created by your presence blocking light. However, when the sun is up and shining brightly, shadows can become less defined or disappear altogether.
In a darkroom, there is no light for objects to cast shadows. Shadows are created when an object blocks light from a source, but in a darkroom environment, there is no external light source for objects to cast shadows.
Things Not Seen was created in 2002.
Seen - Winterthur - was created in 774.
My Eyes Have Seen was created in 1959.
You Have Seen Their Faces was created in 1937.
Murder Seen was created in 2000.
The French as Seen By... was created in 1988.
As Seen from Above was created in 1997.
I Had Seen Castles was created in 1993.