Why not buy a road-legal DRL LED kit? That way you don't lose your fog/spotlights and avoid canbus problems. Even Halfords have got genuine DRL kits, as well as "styling" LED lights. The videos and fitting instructions by Ring and Prism will explain, but basically legal DRL's auto switch off or dim when the sidelights and/or headlights are switched on, and "styling" lights are switched manually, by the driver. None of these have canbus problems, as they are not part of the factory wiring loom.
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As they get more common, you might get pulled on an MOT for not conforming to the DRL regulations, and possibly attracting the attention of Mr. Plod!
All new cars conforming to EU regs have to have DRL's though the format is flexible. My only worry with the lights is the fixings, two easy to undo screws or adhesive is just asking for trouble from the local scallies. If I do get any, I want them to be a bit more secure than that.
I fitted a pair of 9-LED sidelights for the cost of two halogen bulbs at Halfords, if they only last 4 times as long, I will be quids in. (plus they look cool