I do a lot of sstuff with glows like that.  My usual method is to put in the filament object with a bright but short distance3 aura and make it a very bright shade of what I want the color to be.  Bright yellow normally.  Next I either use a sphere or a custom spline object for the bulb itself.  The bulb has an aura as well.  A bit less intense than the filament.  Next I set up the shader for the object with a 97% transparency and color it to the desired color.  I add about 5 for the reflection value and I also add a small amount of refraction.  Usually using an index for common glass.  Lastly I add the main lightinng source itself.  I place a bulb light source in the exact place I have the filament in, inside the bulb object object.  I find it works very well for me.  I sometimes add a tiny amount of glow and a very small but intense light sphere to the bulb light, to make it look like the filament has that intense glow at it's center.  And make sure to turn on soft shadows for the light.  I find that this method makes it easier to set up proper shadows if the bulb is going to be inside some king of fixture.