  Einstein equations with $T_{\mu\nu} = k_\mu k_\nu + \ell_\mu \ell_\nu$ where
$k, \ell$ are null are considered with spherical symmetry and staticity. The
solution has naked singularity and is not asymptotically flat. However, it may
be interpreted as an envelope for any static spherical body making it more
massive. Such an interpretation and some of its implications are detailed.
