Do I need 2.5v or 3.5v for this 43 light string? Those are the only choices the OEM had, right?
Found a source of 35 light strings with 3.5v bulbs in single colors so I could buy 3 sets to get the blue, amber, red/orange that I need.
125/43=2.9 so 3.5 should suffice but could be a little dimmer. You could short out about 8-9 lights and it should be ok.