Hi,
Thats funny, I've just done the opposite, sort of. My car came with your lights which were bolted to the bumper but when I decided to run just with overiders I needed some other way to fix the fog and reversing lights. In the end I purchased 2 lights in the style of the rear brake/lights as already on the car and fitted these at each end of the number plate plinth. So far I have only fitted the fog light as I am trying to keep the back view of the car as simple as possible. I'm very pleased so far. When removing the old lights I was surprised to see just how much they had corroded. Mine were not stainless but had obviously collected water on the inside and were heavily rusted, even though they had hardly gone out in bad weather. So yes, silicone sealing is very important. Paul