In this letter, we propose that a proper constituent gluon mass mg=450 MeV can be applied to identify the hybrids composed of quarks and gluons. By investigating the spectra and decay widths of the light hybrids (qqˉg) with JP=1−+
Nearby in the stack
, we find the
π1(1600)
and
η1(1855)
may not be explained as
1−+
hybrids, simultaneously, and the
η1(1855)
observed by BESIII may not be a hybrid. In addition, we predict an existence of a hybrid
η1(1640)
, which can be verified by searching the
a1(1260)π
channel. Moreover, we suggest the
K1(1270)Kˉ
and
K1(1270)π
as the golden channels to search for an isospin-0 and an isospin-