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 0.01635 0.0153866 0.0173134 4 h after dark 0.0 0.0 0.0 8 h after dark 0.007238533333333334 0.0 0.0217156 12 h after dark 0.0 0.0 0.0