Here's an unusual light. 237mm long x 24mm. 'E'9 marked, compact strip lights with Indicator function. You can use them in pairs on each side of the car.
Pre-wired with two, 400mm fly leads. Supplied with a removable white silicone gasket / rear cover for weatherproofing.
And here's the clever bit. Its slightly concave by just a few millimetres so that, as you screw them in place it'll seal in the middle first then at the ends as you tighten the screws. Nice. Fits in a cut out 202 x 18mm with 214mm hole centres.
One Lamp LED INDICATOR LIGHT #LEDIND237