These bulbs look and perform similarly to the major brand bulbs. Great brightness and beam pattern. No glare. These turn on just as quickly. Visibility is great too.The box and packaging is great. They also came with soft cotton gloves to protect the glass bulb. Oils on the bulb will shorten the bulb life due to non-uniform heating and cooling. These D1S bulbs installed easily into my 2011 X5 headlights with no fitment issues. Plug and play. I took out the old and put the new one in place. I made sure it was seated properly and clipped it in.The GOOACC D1S HID Bulbs is the one on the left. The right is a major brand 4300k bulb that was installed over five years ago. The GOOACC D1S HID Bulbs is slightly whiter. The old 4300k bulbs also had a little hazing on the glass from use and aging. Headlight bulbs get dimmer and dimmer as they age. It's hard to realize until they get replaced. A new 4300k bulb would probably be slightly brighter and yellower than a 6000k bulb. A 6000k HID bulb is still pretty bright. Also make sure your plastic headlight assemblies aren't hazy from light and sun exposure and aging.The price is great compared to major brand bulbs like OSRAM or Sylvania. You can buy four sets of these bulbs compared to one set of major brand bulbs. For the price, you can keep an extra set around. We will have to see how long these GOOACC last.
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