I don't know anything about them but noticed this. If you look really closely at the bulbs, it looks like a regular H4 bulb that's just covered with another blue glass covering over it. If that is the case, I think these wouldn't last too long b/c it would keep the heat of the bulb enclosed... which wouldn't be a very good design. Although they do have there own relays and wire harness which means you don't have to worry about frying the stock ones if they are high wattage bulbs. As for the color, anything over 4000 is white, 5200 would be a blue-white. Those are only comments from what I can observe from the pictures. The price isn't expensive at all for what you are getting. Then again, you can pick up some really nice H4 bulbs for a little cheaper. Your call.
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