@ Electro General
To quote Quaz51 from Beyond3D (often referred to as Beyond3D's local pixel counter of Halo 3 is 640p fame):
"for simulate HDR lighting on X360 games use generally FP10 (except Halo3 ) but FP10 isn't really HDR, it's rather MDR precision. "
Nobody at Beyond3D seemed to care about this comment though. Of course it seems more easily upset little kids post here.