Supposedly they do make an in-line dc to dc booster for LV lighting applications, but I've never seen one and don't know who has them. The ones for PV's and such though seem to be everywhere. Is there any way to maybe separate the legs and step up the voltage to that leg using something like one of these 12-22V multi-tap transformers? Looks like they are also on sale at the moment, which is always nice.