thanks! i guess that's what happens when i get too specific with a search (philips masterline es 20w mr16). now if i osram sylvania would just start shipping the narrow flood (24 degree) to the U.S. i'd know for sure which light i like better... may save $ by ordering both from the u.k. talked to william (lvr maker) about regulation... he said not to bother with a regulator on a 14.4v system with 12v mr16s... said if i was using a 19.2v pack (which he recommends for what i'm doing) he'd say use a voltage regulator. alot of help that guy. thanks again.