The Lighting Section at Joe Lucas had an Isis, it was a van or estate, can't remember.
It had been rewired to take every sort of lighting accessory you can think of, quite a complex arrangement.
It was used for road tests of different headlamps designs, fog lamps etc.
A very interesting place to work when I was an apprentice, also scored a specially tested and selected headlamp P700 for my Vincent which had notoriously poor electrics by Miller, the worst ever made, and they said Lucas was The Prince of Darkness