When I first heard how great and aftermarket head lamp harness was decided to check the total voltage drop between the battery and the left and right head lamps. Left was only 0.1 volts and the right, a long run was something like 0.25 volts, more BS.
Even more BS was these 42 bucks for Phillips or Sylvania 100% brighter head lamps, was no better than the Xtravisions at 12 bucks a pair, they were an honest 30% than the stock bulbs. Plus the last pair lasted over eight years, these way overpriced head lamps, luck to get six months use out of them. And a burnt out head lamp is worse than one that works.
Bit of logic and even a stupid question could be asked, how do they get twice the same brightness out of the same 65 watt bulb? They don't and just lie about it. Adding fog lamps sure made a huge difference, now getting 100 watts per side rather than 65 watts. Have no idea why they can't be used with the brights, but is the law, and breaking the law can lead you into deep trouble if involved in an accident. Logic is not used with many laws.
Other lines of BS is using a bulb instead of a double reflecting surface with these way overpriced plastic head lamps assemblies. And you must have an extremely good seal. If not, when the head lamps are on, increases the pressure inside, not bad, but when they cool off creates a vacuum that sucks in moisture, that really dims your light. Then they scratch very easily.
Even more BS are these DRL head lamps using point contact made in China relays and fast blowing fuses, the brights have replaceable relays in the underhood fuse box. But who knows whats inside of the BCM, using PWM to dim them during the daytime, not sure if using more relays, but a power MOSFET makes more sense. If you blow that will be out $$$$$, then the logic is stored in flashram, how dumb can you get?
If I really want to see the road at night, can get into my motorhome with that four rectangular seal beam head lamp system, but in a sense, need that, stopping distance is far greater than a little vehicle.
If you make any modifications of this type, you are accepting the liability, not about to do this for the kind of crap they are making today. If you were an expert witness like I was for years dealing with court cases, you would know what I am talking about. Ignorance is no excuse for breaking the law.