Drive by noise?No but I do drive by for work.
Possibly. The later stalks feel very flimsy and I'm toying with a couple of relays with the standard H4 bulbs.I have also fitted 80/100 W bulbs without any modificaion to the wiring, or relay fitting, and they worked fine for a period of ten years. Car was a 1979 one, with the early style stalk switches. It seems that they can handle extra current, perhaps because they had been engineered for 6V system?
In the UK mot, they check that the headlights work, they check the colour, (white or yellow is allowed), they check that the patterns are correct and that they're correctly aligned. That's it. They don't check the wattage of any bulbs... 80/100 W bulbs ... will be a MOT failure ...