condition mean min max 0 h after light 0.0 0.0 0.0 2 h after light 1.136165 0.0 2.27233 4 h after light 0.0 0.0 0.0 8 h after light 0.0 0.0 0.0 12 h after light 0.0 0.0 0.0 2 h after dark 0.0 0.0 0.0 4 h after dark 0.97265 0.0 1.9453 8 h after dark 0.0 0.0 0.0 12 h after dark 0.0 0.0 0.0