condition mean min max 4 h after light 2.41091 2.14952 2.6723 8 h after light 2.6501 2.2804 3.0198 12 h after light 4.03271 3.59051 4.47491 4 h after dark 4.92311 4.77249 5.07373 8 h after dark 4.40488 4.266 4.54376 12 h after dark 3.94809 3.94239 3.95379