condition mean min max 0 h after light 7.96527 7.01341 8.91713 2 h after light 5.341335 5.24202 5.44065 4 h after light 6.306985 6.26197 6.352 8 h after light 6.69418 5.95176 7.4366 12 h after light 8.118385 7.98576 8.25101 2 h after dark 8.4515 8.02492 8.87808 4 h after dark 8.398 6.7408 10.0552 8 h after dark 9.425775 8.96349 9.88806 12 h after dark 8.24249 7.31961 9.16537