> From: Dave Biasotti <[EMAIL PROTECTED]> > Subject: Riding to Guggenheim, now Lights > > I'm running PIAA's newest H4 bulb called "Extreme White" which is a step > up from the "Super white" bulb. Puts out a light intensity of 4150 K and > is definitely a lot more white, not as "yellow" as the previous one.
Dave, That 4150 K should mean "kelvin degrees", i. e., color temperature of the light, not intensity. Color temperature is a measurement of how yellowish or bluish a certain light is, with standard daylight being 5500 K. Household bulbs range from 2800 to 3200 K (orangish), the flash on your pocket camera about 6500 K (bluish, hence the pale skin tones in many flash pics), and so on. 4150 K is quite white, approaching sunlight (5000 K or so). But, it has nothing to do with output intensity. To find that out, you should look for a number expressed in lux, lumens, or usually in the US, footcandles (those three are not the same thing, but they are all related to intensity). I don't know about that "European contact", but my GTS (a red-blooded Spanish one) does have a two-bulb job, as all of the European ones, I believe. Best, Roberto. PS: In our "Art of the motorcycle" exhibit at the Guggenheim museum in Bilbao they had a blue one. Probably to get'er to keep still...
