Headlights - Black Crystal question

Has anyone had any experience w/ black crystal headlights? I installed the regular (chrome/silver) reflector headlights on my Satellite and they're a huge improvement over stock Halogen light's. Now I see these new 7" Black crystal headlights for Dusters and such. But cannot find any conclusive info on them. My brain says black absorbs light and therefore they'd suck really bad. But crystal is highly reflective - So that offsets the black absorbing? Are they just for looks? I gotta admit - they do look pretty cool.