Can you solve the formula of bedroom ceiling lamp from the perspective of geomantic omen?

It is best not to install the ceiling lamp in the bedroom directly above the bed. People will feel oppressive when they sleep in bed. Geomantic omen "likes circuitous, avoids going straight", which is not too complicated, but it has a sense of weight and drop. Round ultra-thin type is best. Avoid trapezoid and other strange shapes. If it is square, be careful not to let its sharp corner direction, and don't make a mistake.