I have silvered original reflectors on my sedan. When properly focused, they are very bright with original, well grounded, filament bulbs; certainly bright enough for me to see well with my marginal night vision. Many Repop reflectors have an incorrect parabolic curve, and reflect light poorly, so that even with halogens they are scarcely brighter than filament bulbs in an original reflector. My station wagon came with repop reflectors rigged for halogens. While they are bright, the difference from the silvered originals in my sedan would not be worth the price if I had to buy them, and they require the additional expense of an alternator.. I have heard that Aluminized reflectors are great, but I have no experience with them. I'm sure someone here will mention them. There is also the appearance of your headlight reflectors in daylight to consider. Silver through the lens looks distinctly different than aluminum or chrome. Once you notice that, you'll see it on every A you look at. I personally prefer that warmer original look of silvered reflectors to the more blue look of the alternatives.