Alternate way to spawn proof

There should be an alternate way to spawn proof areas. One that doesn’t need light or at least not light level 8 or above. I’m reposting this feedback idea because I couldn’t find my other article about the same topic. I saw that in the most recent snapshot, the concept of having hostile mobs only spawn on blocks that had light level 0, was introduced. I don’t know if that’s why I can’t find it anymore but here is the idea again anyway. Light can be used as decoration too!