condition mean min max 4 h after light 1.66848 1.6311 1.70586 8 h after light 1.4354900000000002 1.41351 1.45747 12 h after light 1.356905 1.28899 1.42482 4 h after dark 2.43013 2.23143 2.62883 8 h after dark 2.14029 1.90886 2.37172 12 h after dark 2.65425 2.56744 2.74106