Light plays a very important role in creating good feng shui. Dark corners in homes attract a lot of negative energy that can be harmful for the family. A brighter home is always more auspicious than a dark and gloomy one. If you were planning to renovate your house, the addition and widening of windows to let in more natural light would be a great idea. Sunlight rejuvenates the energy of a room. As much as possible, all rooms in the house should have window, especially the bedrooms. Although bedrooms are predominantly Yin areas of the home, it is inauspicious for the bedroom to be too Yin (passive and dark), as it would resemble a tomb. Having a window allows the bedroom's energy to a renewed everyday by letting in fresh air and sunlight.
On the other hand, it is also a bad idea to have too much light in the house. Floor-to-ceiling windows and glass doors tend to let in too much light. A room with too much Yang energy is also a bad idea, as it may cause restlessness and petty irritations.
A fresh coat of paint would also do wonders to the room. The walls and furniture is should be painted or cleansed regularly to get rid of accumulated negative Chi. This is the quickest and easiest way to renew the Chi of the home.
As much as possible, important areas of the home such as your bedroom should not be located next to toilets and the kitchen. If this is inevitable, at the very least, make sure your bed or work desk does not share a wall with the toilet or the stove (with the toilet and the stove on the other side of the wall).
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