Why should not be on the top of the sofa has a light point-blank

Sometimes around the sofa of weak light, many people will be placed on top of the sofa decorative lighting, for example, hidden in the ceiling of the canister light or outward signs of shoot the light, because too close to the sofa, tend to be straight down from the top of your head, it against the way of feng shui, reason should be avoided.And from the environment in terms of design, sofa head light point-blank, tend to make emotional tension, dizziness, gets ants in her pants.If the lights change toward the wall, can slightly eased.