condition mean min max 4 h after light 0.0 0.0 0.0 8 h after light 0.0 0.0 0.0 12 h after light 0.082513 0.0 0.165026 4 h after dark 0.149749 0.0 0.449247 8 h after dark 0.0 0.0 0.0 12 h after dark 0.0 0.0 0.0