Complex sentence: HiPER's driver is about 200 kJ and produces densities of about 300 g/cm³, about one-third that of NIF, and about the same as generated by the earlier NOVA laser of the 1980s.
Split into simpler sentences: HiPER's driver is about 200 kJ and produces densities of about 300 g/cm³. That's about one-third that of NIF, and about the same as generated by the earlier NOVA laser of the 1980s.