ancient lights
noun/ˌeɪnʃənt ˈlaɪts/
/ˌeɪnʃənt ˈlaɪts/
[uncountable]- (in English law) the principle that you have the right to receive light through any window that has been there for 20 years or more. It may be used in cases where a person wants to build something in front of your house, etc.
古灯：您有权通过已经存在20年或更长时间的任何窗户接收光线的原则。如果有人想在您的房屋前盖东西，则可以使用它。