“用灯光装饰”常见的英文表达有：decorate with lights 或 adorn with lights 。
例如：
People decorate their houses with lights during the festival.（人们在节日期间用灯光装饰他们的房子。）
The city square was adorned with colorful lights for the celebration.（为了庆祝活动，城市广场用彩灯装饰了起来 。）