600w switchable MH/HPS combo ?????

Has any one seen the 600w electronic switchable MH/HPS combo on amazon.com ? Has anyone tried this set up or have any info on them are they worth it ? Because i havent seen any of these types of lights before. I am shopping around for the same type of thing but in 400w and have seen a bunch of these any how any info would be great. Thanks

I don't think it's switchable so much as pulse start metal halide.