condition mean min max 4 h after light 0.0 0.0 0.0 8 h after light 0.0183627 0.0 0.0367254 12 h after light 0.01674515 0.0 0.0334903 4 h after dark 0.01484765 0.0 0.0296953 8 h after dark 0.0146691 0.0 0.0293382 12 h after dark 0.0121591 0.0 0.0243182