condition mean min max 4 h after light 1.635565 1.44756 1.82357 8 h after light 1.153278 0.939906 1.36665 12 h after light 0.95973 0.90222 1.01724 4 h after dark 2.203425 2.11996 2.28689 8 h after dark 2.1155749999999998 1.91934 2.31181 12 h after dark 1.97271 1.75075 2.19467