Um ... not to nit-pick, but free-space losses are for isotropic radiation, and can be compensated for by a high gain antenna -- remember that lasers are also em-waves -- a perfectly focused beam, if technologically possible to generate, would travel through a vacuum indefinitely (otherwise, it'd be a violation of conservation of energy, no?). So, throw a well designed antenna system up there and although you still won't have 100% efficiency, it certainly won't be 1/150th of the power generated in geosync.
