Quote Originally Posted by ASTIG
performance:
typical 55w halogen = ~1000lm
4100K philips d2s = 3200lm
6000K philips d2s = 2400lm
so you can see 4100K is about 33% brighter than 6000K and 3.2 times brighter than an H4's low beam.

Question:

What is "lm"?



OT
Cool ride dude! I noticed you have Illinois plates on them, I did studied in Skokie once. :D