condition mean min max 4 h after light 4.673755 3.43992 5.90759 8 h after light 6.133475 5.73483 6.53212 12 h after light 5.64255 3.73112 7.55398 4 h after dark 4.926925 4.92038 4.93347 8 h after dark 10.22774 8.24148 12.214 12 h after dark 9.193545 8.07289 10.3142