This debate can be considered from several aspects. First of all, turning off the lights helps to have a rest. The night time is the time when the body clock is set to sleep, especially in the dormitory. Several people live together, one person turns on the light, and everyone can't rest well, so turning off the light can ensure a good rest environment for everyone. It can be further pointed out here that a good rest can make people energetic and so on. Secondly, turning off the lights helps to save energy. Here, we can carry forward the traditional virtues of thrift and build a conservation-oriented society. Third, turning off the lights will help college students to develop good habits of living and rest, and also help people not to be addicted to internet addiction and online games. (This statement is a bit far-fetched and cannot be used as the main direction, but it is hard for the other party to think of it and it is likely to surprise the other party. Fourth, turning off the lights is more conducive to creating an atmosphere of lying down and creating a romantic atmosphere. I believe everyone has seen the spoony man who set off fireworks and made love after lights out. This argument can be used as a funny little highlight in the debate. I only think so much at present, I hope it will help you.