condition mean min max 4 h after light 9.3307985 8.743243 9.918354 8 h after light 9.244393500000001 8.700804 9.787983 12 h after light 9.374537499999999 8.87651 9.872565 4 h after dark 9.484898 9.484898 9.484898 8 h after dark 9.9385875 9.726612 10.150563 12 h after dark 9.031532 9.031532 9.031532