David,
The lamps sit on a dome. If you loosen the 21mm fixing nut underneath – I recommend using a spark plug socket – you can swivel the lamp in all directions.
The lenses really make no odds. You can alter the dip if you wish by turning the reflector within the bezel (clockwise from the front to achieve a LH dip) but you may need to file a new location slot in the reflector.
B….
Bernie