condition mean min max 0 h after light 13.6857 13.1182 14.2532 4 h after light 14.72355 14.0125 15.4346 8 h after light 27.3519 26.7473 27.9565 4 h after dark 24.61755 20.4537 28.7814 8 h after dark 18.6622 17.5256 19.7988 12 h after dark 12.56185 11.7461 13.3776