We introduce a photon container with suitable characteristics and boundary conditions for photon ordering and in the linear approximation solve the Helmholtz equation for vector potential in spherical coordinates. The polar and radial dependences of the obtained relations for the eigen modes advise a likelihood condensation. In addition the successive zeros of the radial component and polar component of the energy current density lead to photon confining in a configuration of photon bundles. For the photons in every bundle conditions comparable with their condition in an optical microcavity are provideable so that their dispersion relation becomes nonrelativesticly and the photons may attain number conserving thermal equilibrium.

Keywords: Vectorial Helmholtz Equation, Energy Current Density, Stationary and Equilibrium Modes, Photon Condensation, Optical Microcavity

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