condition mean min max 0 h after light 0.138983 0.0 0.277966 4 h after light 0.1416135 0.0 0.283227 8 h after light 0.068751 0.0 0.137502 4 h after dark 0.1370385 0.0 0.274077 8 h after dark 0.0690175 0.0 0.138035 12 h after dark 0.0678865 0.0 0.135773