Reasonable force means you can hurt them (pretty badly) but once they stop being a threat you have stop hurting them.
So, dead?
It's almost unreasonable for the courts to believe that someone experiencing a home invasion would be in anything but survival mode, and would have the capacity to simply "calm down" once the threat has been stopped. Because to them, they don't know if the threat is over, or if someone else is going to bust in to kill them, or if the original attacker will fight back, or if they have a weapon, etc.
Courts should be very lenient towards homeowners deafening their life, family, and property. And if the jackass who decided to commit this crime is still alive, they should have severe consequences laid on them, with additional compensation to the homeowner for the trauma they caused.