I found your comment about NightSun as I was reading thru the entire thread. Yes, my old NightSun, one of the old American hand-built team issue types still works, I just keep replacing lamps. As the housing is metal and not (cheesy) plastic I am going to rebuild it with a pair of MR16 50 watt halogen spots when the budget allows. I already have enough battery to power them for my 2 1/2 hour commute.