| night sleep | 1.25 | Lamm died in his sleep that night. | ||
| hour sleep | 0.86 | He intended to catch a few hours sleep. | ||
| day sleep | 0.59 | I find that I need very little sleep these days. | ||
| slow-wave sleep | 0.39 | The first two hours of the night were spent in deep, slow-wave sleep. |