condition mean min max 4 h after light 12.636316 12.042802 13.22983 8 h after light 11.6177375 11.504289 11.731186 12 h after light 17.893318 12.454316 23.33232 4 h after dark 14.461119 12.63587 16.286368 8 h after dark 14.5940995 13.743301 15.444898 12 h after dark 27.926373 27.926373 27.926373