condition mean min max 4 h after light 0.7144245 0.521598 0.907251 8 h after light 1.0187975 0.826625 1.21097 12 h after light 1.426985 1.24847 1.6055 4 h after dark 1.78089 1.30309 2.13632 8 h after dark 1.26538 1.0572 1.52903 12 h after dark 1.379648 0.868134 2.09531