condition mean min max 0 h after light 0.7557705 0.523836 0.987705 4 h after light 0.812511 0.651199 0.973823 8 h after light 2.33331 2.24177 2.42485 4 h after dark 1.372195 1.36949 1.3749 8 h after dark 1.178105 1.14443 1.21178 12 h after dark 0.6565135 0.348134 0.964893