The ambient node on your light bars will work nicely I would think :o).

Laurie

Yep.  Increase your ambient value to 1 or higher.  If your scene is enclosed, definitely use IDL to add a realistic global illumination.  If you find that this lighting isn't enough, I would recommend additional, low intensity lighting to help along.

Really easy. In the Materials room set Ambient_Color to the color you want for the light and set Ambient_Value to higher than 1 and your light will glow. Below is rendered in P8 with no lights or textures. Just the Ambient_Value set to 2

Hope this helps.
Sorry I seem to be a bit late with this.

would atmosphere help?

I think if you want the glow to extend beyond the physical light you need to create geometry for it and a shader. I saw BagginsBill tutorial somewhere on this and can't remember where.

Quote - I think if you want the glow to extend beyond the physical light you need to create geometry for it and a shader. I saw BagginsBill tutorial somewhere on this and can't remember where.

Look at the quick pic I posted. The tube is acting as a light emitter as you can see on the ball. There is a thread on this subject for P7 in which a Gather Node is attached to the object that you want to illuminate with your light. It may be that to which you refer. Since the question refered to P8 this is the easiest way to make a prop a light emitter that I know of. I'm gonna search for the thread you mentioned though to see if there is an easier or better method.
pdg

Yeah but that is not a volumetric glow and I think they were asking for a glow.  But there are three things here; a self illuminated object (ambient) an object that cast light (gather) and the actual volumetric glow surrounding a light which I think has to be geometry in Poser.

IDL from a light emitter will only emit light into the scene, which is invisible until it hits something. It won't make an object 'glow' in the way nyguy (I think) means.

Atmosphere only works with direct lights, not IDL. So it won't pick up the IDL emitted light from these light tubes.

If the glow has to be in-scene (as opposed to postwork) I would make a larger capsule prop to sit around each light tube, with a suitable semi-transparent Edge_Blend shader. I used this technique for the moon glow in my gallery image Chuu-ai, and it was easy to get a nice glow effect.

Cross-post!

Quote - Yeah but that is not a volumetric glow and I think they were asking for a glow.  But there are three things here; a self illuminated object (ambient) an object that cast light (gather) and the actual volumetric glow surrounding a light which I think has to be geometry in Poser.

Found the tut you were refering to. It is on making a light saber glow which I assume would be the effect required here for the tubes.
http://www.renderosity.com/mod/forumpro/showthread.php?thread_id=2712323

I like it. Something else to play with.
pdg