Originally posted by joeflies:
One of the sad things about the aftermarket parts market is that nobody actually tests their claims, and headlights are a particularly bad area.
There are many aftermarket bulbs which claim improved performance, but actually DECREASE amount of available light. Not all bulbs are the same, there are some that are better than others, but seldom it will justify the cost. Stock headlights, on the other hand, must meet certain standards with that particular car.
One thing I think is particularly funny is the way that kids nowadays lower their cars and install all the aftermarket lights. But you usually have MUCH better light performance simply by just getting a headlight alignment after you change the geometry.
Originally posted by ernest:
studies are showing that the human eye is better at picking up detail from light that is more yellow in spectrum than blue, casting doubt on whether the HID lamps are really more effective. the initial impression is that bluer light is brighter, and that the HIDs are putting out "more light" leading one to believe that there may actually be more light available, when this simply isn't true.)
Originally posted by GrecianVolvo:
the latest (and best) HID lights do not emmit "bluish" light. They emmit a light that is as white as daytime light. From certain angles you may think they are bluish but that is because of the angle. You are seeing one of the colors of the white light which is blue! From certain other angles you may see yellow or even pink!