I looked in the manual but only found a small blurb on using them. Trying to get a grasp on lighting scenes and looking at different options.

From P8/Pro2010, yes, albeit with considerable restrictions.

Easier and more flexibility in P9/Pro2012+.

In P11, you can use Superfly materials and won't need a separate emitter mesh. Very easy.

OK, I am using P11 Pro, What are the steps. thanks in advance

Create/import a mesh. Set it's properties to not cast shadows, and tick the light emitter box.

Apply a material that boosts the render engine's response to ambient strength. I have a partial MT5 (it's only a group of nodes - add it to your material, don't replace your material) in a freebie Superfly material sampler.

Set Superfly render settings with about 15 mesh light samples and at least 4 diffuse bounces. Use branched path tracing (unless) GPU rendering.

If you want to look at pre-made Superfly lightcaster materials, try the Atlantis gate room, or some of the Superfly stuff I have on ShareCG - seachnasaigh's ShareCG

Much appreciated, i'm off to try.

Fantastic tip! Thank you very much!

Here's a simple ceiling lamp prop. You can adjust the height from mounting plate to the lamp.

Many thanks! :D

Some examples of mesh lights in Poser...

This is a rough render ... but the only lights in the scene are the torches ... as mesh lights. (some Shaderworks postwork applied) ...

Very grainy, I know, I wanted the effect, but with many samples and some help the render can be much "smoother". I take that back, I forgot the infinite light for the "moon" set at low intensity.

Really lovely renders, many thanks for posting them.