condition mean min max 3 h after light 0.0 0.0 0.0 6 h after light 0.0 0.0 0.0 9 h after light 0.0 0.0 0.0 12 h after light 0.0 0.0 0.0 3 h after dark 0.0 0.0 0.0 6 h after dark 0.0224813 0.0 0.0674439 9 h after dark 0.01138 0.0 0.03414 12 h after dark 0.0 0.0 0.0