indeed it is a hardware limitation, I'm meaning that kind of light as opposed to lightmaps
Quote: "How about Darklights? What are the advantages of that, or drawbacks?"
Only having used the demo version. all I know is, it creates a lightmap texture much like any modeller, but it's full screen, and you'll see your results im (sort-of) real-time.
When you tell it to generate the lightmap, that will be exactly how it appears in DBP unless you've fiddled with the ambient light level.
The demo version has an infinite number of uses, but removes some faces from the texture, so they are transparent. If what is visible is to your liking, it might be a worthwhile purchase. But experiment with as many free trials as you can, so you don't end up paying for more than one