Is it illegal to install ambient lights in a house with a garden on the first floor?

Not illegal. According to the inquiry method, it is not illegal for car owners to install ambient lights. If the owner can't produce the construction permit issued by the Planning Bureau, it is illegal construction. Common illegal construction behavior, the ceiling in the courtyard on the first floor, the sun room on the terrace on the roof, the self-built house on the platform on the second floor, and the flower stand on the platform of the shop.