To eliminate the presence of light, first, we must to make the light source invisible. Second, its important to make the irradiated surface uniform.
Picture 1 shows the effect that use collimated light to uniform illuminate surface. Picture 2 shows the effect that use non-directive light source illuminate whole space.
Picture 1 use bubble-like fluorescent light in dressing room and discharge light in other room to make sure that all the cloths keep bright .