Quote:
Originally Posted by shingles
I just want to point out that color temp of the headlights (ie white, yellow, superwhite, etc) has NOTHING TO DO with actual brightness (how much light is put out, measured in lumens). Many often confuse white light to be brighter... this is NOT TRUE. If you want more light output, it's pretty simple, check the lumens rating, NOT the color rating.
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that is true, but the color also has to "usable light." The higher the color temp the bluer the color and the less usable light is emitted. the names given to the colors by the manufacturers of lights has nothing to do with it. But it is documented that a light that burns at 4,300k is brighter and has greater output than that of the light that burns at 6,000k+. It also depends on what type of filament or metal used in the light. HIDs for example can have the same color temp as a halogen, but produce far more light. When comparing halogen lights, usually the closer you are to 4,300 the more "useful" the light becomes.
OSRAM SYLVANIA - Whiteness and Brightness
Sylvania explains it a little better than I can.
Side note: Blue light tends to fatigue the eyes more than red, or green (used in night vision.) which is odd considering the dash of the R18 is blue...