I will talk about just my idea.

6000k is color temperature and not real temperature of the lamp.

6000k is originaly representative color tempoerature of Sun light.

Usual home light(백열등) is 2~3000k and Flourescent lamp(형광등) is also about 6000k.

While 2~3000k (warm color) color contain more red, 6000k (cold color) contain more blue.

If you touch flourescent light, it’s not hot at all. If you touch regular light,

it is hot due to infra-red (적외선). Therfore color temperature is

for the eyes perception not real body temperature.

Usual home lighting is about 60~100W.

Then you can compare wire size of your car and home lighting.

Technically you have to know current and wire gauge(example #12, #8 etc).

You may need special ignitor(starter) for 6000k 100W bulb?

Final recommendation is to look at the specification of bulb

and consult with technical support.