There is only one good Light set: That is the one YOU make YOURself for YOUR Poser version.

Let me explain that:

Any Light set, made, built and or sold before Poser 8 vaporises whenever you click IDL to ON.

Any light set that includes an IBL light is for the trash can.
Any light set that includes any AO is for the trash can next to the first trash can.

Any light set made for NO gamma corection disintegrades into dust the moment you put gamma corection on. (FYI Poser8 has NO Gamma corection)

You see??
There are too many variables.

Then??

Inside or outside scene?
What is in the scene?
What light do you need??

What render setings will YOU use?

Short cut: There is no ideal light set.

Long cut? Poser8 you asked?

Poser 8 has IDL so always use IDL in your renders.  => => But the light changes as you have more objects in your scene. More objects giving more diffusing-reflections, so more indirect light.

When using IDL, do yourself a favor: NEVER -EVER to use any IBL light and or any AO on materials or lights.

Your have the "real thing" , you have IDL.
You do not need to fake any more with IBL and AO.

It is like having a wife and a mistress. ( Well, euh) But know that wifes and mistresses have a nasty habbit of fighting each other.  OK. 

For outside renders, use BB's free sphere and ONE Single Infinite true white light at 55% That is more light then you"ll ever need in any outside scene. => You can go as low as 25%.

The best light is ONE single infinite light. => There is only ONE sun out there. And the sun is an infinite light.

For inside scenes, well there just are too many variables. There is no ideal solution.

Most problems come from IDL renders with IBLights and or AO in light or material.
Second most commoin error in IDL scenes is wanting to use too many lights.

Look around you.... And let IDL ( true In Direct Light do its thing at render time as it does in real life.

Conclusion?
Any light setup is only good for your current Poser verson, your current scene, using your current render settings.

Poser 1, 2, 3, 4, 5, 7, P8 and PPro2010, P9 and PP2012, P10 and PP2014 Game Dev
"Do not drive faster then your angel can fly"!