condition mean min max 4 h after light 0.0 0.0 0.0 8 h after light 1.53337 0.0 3.06674 12 h after light 0.0 0.0 0.0 4 h after dark 0.0 0.0 0.0 8 h after dark 0.0 0.0 0.0 12 h after dark 0.0 0.0 0.0