  Spectrum of gluons in the adjoint source field is computed analytically using
the QCD string Hamiltonian, containing only one parameter - string tension,
fixed by meson and glueball spectrum. Spin splitting is shown to be small. A
good agreement is observed with spatially generated gluelump states measured on
the lattice. Important role of gluelumps defining the behaviour of
field-strength correlators is stressed and correspondence with earlier
computations of the latter is established.
