01 a4 1.8t HID headlights
#13
Degrees Kelvin. The higher the number, the more into the blue spectrum they get (incidentally, blue is a very bad color for visibility). Look at the luminosity ratings for different K ratings on HIDs. The higher the K temp, the less luminosity they have.
#15
I've had 10,000k's back when I was a lil git and thought the purple/blue was cool. Well it's not cool, dare I say, "Ricer". Visibility sucks!
I have 8,000k's now with my stock halogen foglights and visibility isn't as bad, but I would definitely not recommend them. I'd say 4300-5000k are optimal for visibility and 6000k is probably the highest I would go when I buy new HID's.
I also have 3000k HID's for my foglights (not currently installed). They do a great job of cutting through rain and water on the ground. I do recommend them if you're in an area that gets a good amount of rainfall.
#16
Not to be pedantic, but while we're on the subject, Kelvin is the unit. Unlike other temperature scale's there is no degree.
Other than that, I agree with all of these guys. 4300K-5000K max unless you're interested in not seeing at night.
Other than that, I agree with all of these guys. 4300K-5000K max unless you're interested in not seeing at night.
#20
3000k is VERY yellow.. Not really close to halogens. When you turn them on they're a bit green and warm up to yellow.