Quote -  Clothes or hair not included, what I find baffling is few vendors of lets say building interiors and exteriors include lights but most don't. A light file and thumb is a couple of K. If I were a vendor I would advertise includes the exact light set or sets used to make these promo images. When it comes to items with interiors, buildings, rooms, cars, stage coaches what ever. I would buy the one with the lights (used in the promos) over something similar without the lights.

From what I have seen, most sellers of interiors that are actually fully functional out of the box (textured, etc) do include light sets.  Products depicting exteriors aren't something I have much experience with.  Many (if not most) vendors also include the name of any third-party lightset they have used and I see this very frequently.

I think marketing images using third-party lights is fine if you include some standard lighting renders which are available with a default install of whatever product you are creating for.    However, and this is where it gets tricky, in renders using lightsets that use special materials, IBLs, etc not available for purchase or not included in the product without also including a render under more default settings should not be allowed.  We do want the customer to have certain expectations under "default" situations and they should be able to attain a similiar quality render using the tools that come with the package they have.