How to change the bad feng shui in the bedroom?

The bedroom should not be too dark or too bright. If the window in the room is too small or not opened, the air will not convect, the sun will not enter easily, the yang will be insufficient, and the qi will stagnate, which will easily make people feel headache, dizziness and bad temper. According to the geomantic theory, "bright hall and dark room", the bedroom should not be too bright. If it is too bright, it is easy to commit crimes outside, the health of family members is easy to be damaged, and the harmony of family members is difficult to maintain. This is one of the taboos of master bedroom Feng Shui. Local lighting can be appropriate, and local lighting can be used in dark places. Of course, this is just a suggestion. I'm not sure about the feasibility. I don't know much about Feng Shui. What I said above is actually not feng shui knowledge. It should be common sense. Anyway, I hope it is useful to the landlord.