Fog lights and extra beam lights are a rather common optional on classic cars where they have a aesthetic - thanks to the reference to the rally cars - more than practical application. If you are planning to do it on your Spitfire Mk3 (or GT6 Mk2), bear in mind that it's not necessary to make a hole on the bumper or build a complex support.
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Models: GT6 MKII / Spitfire MKIII
Keywords: DIY / Electrical system