This is what I think:

http://lighting.mbz.org/tech/bulbs/s...uperwhite.html

 

from the site you posted:


From the site I posted:

It is a mistaken notion that "whiter" and "yellower" qualities in the white light of a headlamp have any direct link to the amount or usability of the light.

Snip

Remember, color temperature is independent of the amount of light, and there is absolutely *zero* evidence that light of a higher color temperature is better than light of a lower color temperature for driver performance at night. A 4-watt flashlight bulb dipped in the purple coating applied to Piaa "Superwhite" bulbs would look "whiter", but produce less light. And so it is with these headlamp bulbs.

People seem to have the notion that the eye is more sensitive to light of higher color temperature. This is probably as a result of claims made by car salesmen trying to sell HID headlamps more than anything else; it's false. The eye is not more sensitive to the blue cast created by the subject bulbs. There have been several studies done showing improved driver performance (due to improved vision at night) with headlamps of LOWER color temperature (less blue, more yellow). Color perception is much better under lower color temperatures (within the IEC "white" boundaries, of course), and the acuity of the human eye is really quite lousy under light colors that even begin to approach "blue".

CLAIM: "I've got pictures that prove the brightness difference!"

REALITY: You have proof of nothing. Not only can photographs not accurately record or represent the intensity of a lamp or beamcaster, but photos placed on the web are even less true to reality. At best, what you have is something of an illustration of the color difference between the regular bulb and the "Superwhite".

BOTTOM LINE:

The laws of physics are the laws of physics. They don't bend even for PIAA's advertising department. There is no way to get "85 watts of light for 55 watts of electricity" unless the light meter you use happens to go spastic when hit with blue-tinted light.

There is no seeing advantage to these "Superwhite" ("ultrawhite", "hyperwhite", etc.) bulbs, and quite often a disadvantage. They aren't as bad as the "ion blue" junk used by poseur kids who want to pretend they have HID headlamps, but they're not magical


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In short these bulbs are a cosmetic upgrade not better for seeing. Depends what you are looking for I guess. Myself I want function, not to look cool.




These bulbs have a tint coating on them, anytime you put a tint on a bulb whatever the type it will reduce the amount of light output.


They are doing the same thing that PIAA advertises more light for the same amount of watts, aint gonna happen. If you look at the advert closely they are saying something like 60/55W = 130/110 W

I did some checking around and ended up with these bulbs:

http://www.scoobymods.com/forums/sho...&threadid=1247