3000k bulbs are traditionally used in fog light applications and emit a bright yellow output to enhance visibility in snow, rain, and foggy weather conditions.

4300k bulbs are traditionally used in headlight applications but can be used as auxiliary lights in fog light applications. The 4300k color temperature matches the white color temperature in vehicles that come with factory HID systems.

Special note:4300k bulbs emit the maximum light output possible from HID type bulbs. Higher color temperatures emit fewer lumens.

5000k bulbs are traditionally used in headlight applications but can be used as auxiliary lights in fog light applications. The 5000k color temperature produces an LED-like white color and comparatively makes the 4300k color temperature look slightly yellow.

Special note:5000k bulbs emit roughly the same amount of visible light as the 4300k bulbs. Higher color temperatures emit fewer lumens.

6000k bulbs are traditionally used in headlight applications but can be used as auxiliary lights in fog light applications.

Special note:While any HID bulb will emit 2-3 times the lumens a halogen bulb emits, higher color temperature bulbs emit fewer lumens than lower color temperatures. A 6000k bulb will emit roughly 12% less light than a 4300k bulb.

8000k bulbs are traditionally used in headlight applications but can be used as auxiliary lights in fog light applications.

Special note: While any HID bulb will emit 2-3 times the lumens a halogen bulb emits, higher color temperature bulbs emit fewer lumens than lower color temperatures. A 8000k bulb will emit roughly 10% fewer lumens than a 6000k bulb and roughly 20% fewer lumens than a 4300k bulb.