Controller efficiency factor (CE)

During a certification process I have found an electronic irrigation controller (model Hunter Pro-C) that is equipped also with a rain sensor (model Hunter Rain-Click). I need to prove the efficiency of this controller (CE), but I can't get this information directly from the manufacturer. However, there is a general document from Hunter (http://www.hunterindustries.com/sites/default/files/Hunter_LEED_Guide.pdf) where some efficiencies are available, for example: - Automatic controllers (including Hunter Pro-C): water savings up to 10%; - Rain sensors (including Hunter Rain-Click): water savings up to 20%. My question: is this information enough for LEED? In that scenario, which values shall I use for CE? Many thanks!