This is the ability to generate an aura of psionic darkness around oneself. This aura of darkness makes the area around it look like it would at night (hence the name), and psionically blinds everybody in the field, along with making anyone within the aura/field appear invisible to anyone outside of the aura/field. Not to mention, this aura also protects the user and anyone else within the field from intense light, as the field absorbs all ambient light within a certain radius.