I see that no-one has picked up on converting side/stop lights to fog guards yet. It may be that it can't be done. When I had an MGB there was a little black box with on/off switch and containing a bulb and ballast resistor wired into the sidelight feed which performed this trick: it increased the brightness of the brake lights too but I can't remember where I got it. It worked well all the time that I owned that car.
It has occurred to me to fit another torpedo light onto the back panel as log as I can keep the edge 100mm from the edge of the existing brake light. Any thoughts?
