condition mean min max 4 h after light 7.637515 7.53628 7.73875 8 h after light 8.593399999999999 8.59084 8.59596 12 h after light 7.30799 7.23176 7.38422 4 h after dark 11.264804999999999 9.90291 12.6267 8 h after dark 11.389050000000001 11.3638 11.4143 12 h after dark 9.59694 9.25821 9.93567