condition mean min max 4 h after light 94.02195 91.2951 96.7488 8 h after light 81.4154 77.5454 85.2854 12 h after light 77.9119 77.5515 78.2723 4 h after dark 52.2301 47.305 57.1552 8 h after dark 60.8981 60.572 61.2242 12 h after dark 77.07795 76.9453 77.2106