Last night I thought the Iseki tractor headlights are a bit dim, should really pop some LED bulbs in there.
Not so easy. Turns out it has the most exotic sockets. APF (American Pre-Focus) triple-hole holders, also known as RP35 and various other misleading names that yield the wrong results.
There are 2 classic motorcycle shops in the EU that do sell these, but most are 6V (I need 12V) and all of them are priced for motorcycle polishers, not farmers.
I guess I'll see if I can just get replacement headlights with reflectors instead. Or fit a ROPS and some big work lights.