carefull. usually the lumen / candella rating is drivin by current. if you put a much higher wattage incandescent bulb in the car, you could roast your wiring.
if you have xenon, the 'temperature' of the bulb (6000K, 10000K) doesn't really affect brightness so much as color. (6000K = white, 8000K = blue, 12000K = purple)
i'd go with Litronics if you have the means. if you have halogen, i wouldn't mess around too much.
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