[en] Polarization properties of light fields were studied. The notion of polarization spin (P-spin) describing double polarization degeneracy of energy-pulsed eigenstates is used to characterize polarization structure of quantum light fields and to reveal its sufficiently quantum peculiarities. A new class of light field states is obtained. The definite similarity of such states with nonpolarized light is noted. Differing from the classic nonpolarized light the P-scalar light is not a result of chaotic mixing of light waves, but it is generated by biphotons having rigid phase correlations. The two-photon laser or circuits of parametric scattering with SU(2)_p-invariant interaction Hamiltonians can be ideal generators of P-scalar light