The Lightfield Home Defender 12 gauge rubber slugs are the worst possible choice for those who are concerned about using standard shotgun shells
There, fixed it for you.
Rubber slugs are not for home defence they are for crowd/riot control. Let me say that again; Rubber slugs are not for home defence they are for crowd/riot control.
A home defence situation either calls for deadly force or it does not, if it does not you do not introduce a firearm into it.