CaptainKrunch wrote:
>
> I would like to see how they are measuring light and what loophole they are
> jumping through. Is it total lumens or lumens at a given distance or is it
> temperature or what? Perhaps they are able to get more light from the same
> wattage bulbs and they are following the wattage laws.

Me too, so I contacted Sylvania, asking about the differences between
standard, XtraVision, CoolBlue and SilverStar. This is what they
replied:

"The XtraVision is a brighter product in terms of lumen output. The
increase in output on the XtraVision is by gaining a wider beam pattern
for better peripheral vision. The Cool Blue is a slightly higher color
temperature than the standard version, which gives it a whiter
appearance. A standard product is 3200 degrees Kelvin and Cool Blue is
at 3500
degrees Kelvin. The higher the color temperature the whiter the light
will be. The SilverStar has a color temperature of 4000 degrees Kelvin
and as I mentioned in the previous email, SilverStar also has the
redesigned filament and gas mixture to maintain a fuller beam pattern.
Down
road distance on all these products are the same. The difference is in
how intense the light output will be and the color of the light output."