i had modelled a bike and a showroom. Also i had created lights. Is there is any possible way by which certain lights doesn't cast it's glow or light on some objects.
check out LIGHTING/SHADING-Light linking
there you can select what lights effect what geomtry..
also.
if you look at the light attributes you can turn on or off Diffuse( the even light) and Specular (the highlight)
this will effect all geomtry lite by that light.
Hope that hepls.