  We describe the formation of highly degenerate, Landau-level-like amplified
states in a strained photonic honeycomb lattice in which amplification breaks
the sublattice symmetry. As a consequence of the parity anomaly, the zeroth
Landau level is localized on a single sublattice and possesses an enhanced or
reduced amplification rate. The spectral properties of the higher Landau levels
are constrained by a generalized time-reversal symmetry. In the setting of
two-dimensional photonic crystal lasers, the anomaly directly affects the mode
selection and lasing threshold while in three-dimensional photonic lattices it
can be probed via beam dynamics.
