ForgotUmbrella  filed a request to merge volnoti-brightness-git  into volnoti-hcchu-git :
I believe they are the same package, as they both use the same upstream URL. They both provide the same feature set too, although the description might suggest otherwise.
Request #8457 has been rejected by Muflone :
I've merged the volnoti-hcchu-git package into volnoti-brightness-git as the former currently had no maintainer