What feng shui will be affected if the room behind the house is not bright?

In the first case, the room behind the house is not bright, which will cause the house to lack light. It's just a kind of energy. People who live in houses will naturally get no energy for a long time. People who lack energy will appear lifeless, and lifeless people are prone to get sick.

People need to constantly replenish energy, including light energy and so on. Where did the earth come from without the sun?

In the second case, the room behind the house is lit up, which is a good sign, indicating that there are pillars and backers.