Looks like you are going to need media, emitting or scattering kind; or
maybe just a highlight on the sphere objects. Either way you'll want to use
light_group to collectively affect them from only the light source intended
instead of any external lights, I believe. Unless the material making up the
light objects is supposed to be a kind of plastic or glass, in which case
you would need secondary spheres acting as a shell around them, containing
the media. Then the inner spheres can have specular highlights. Upping the
default diffuse finish might also help, perhaps via an interior_texture.

Bob H.

"David Wallace" <dar### [at] earthlinknet> wrote in message
news:3f145b40$1@news.povray.org...
> I want to make the lit bulbs in this readout display stand out from the
> rest.  How do I pull it off?
>
> #macro otrLight(col, rad, active)
>  #if (active)
>   light_source {
>    0, 1
>    fade_distance 1
>    fade_power 1.7
>    looks_like { sphere { 0, rad
>     hollow
>     pigment { rgb col filter 1 }
>     finish { ambient 1 }
>    } }
>   }
>  #else
>   sphere { 0, rad
>    hollow
>    pigment { rgb col filter 1 }
>   }
>  #end
> #end

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