BAASR Receptacle Plug Brand S Adapter (UL-Certified) for Hydrofarm-Compatible Grow Light Reflectors BAASR Plug Brand S Adapter that connects a "Brand S" ballast with a HydroFarm or any compatible reflector unit. Solves the problem of not being able to use Hydrofarm ballasts and "Brand S" reflectors in combination due to incompatible plugs. UL-Certified BAASP plug adapter adapts a HydroFarm fixture set to any ballast.