"Shadow Blend (Su): In any conditions other than full daylight, a 7th-level Dark Moon Disciple can disappear into the shadows, gaining total concealment.
Artificial light does not negate this ability, though a daylight spell does.
This benefit replaces the wholeness of body class feature that the standard monk gains at 7th level."
"Shadow Blend (Su): In any conditions other than full daylight, a shadow creature can disappear into the shadows, giving it total concealment. Artificial illumination, even a light or continual flame spell, does not negate this ability, but a daylight spell will." I don't know if I use it if I'm always 100% concealed as long as I'm in the darkness or I need to activate it at some point with a free action perhaps?.