Well I may have found the answer myself here is an interesting read on lights.
What is Kelvin (K) ? :
Color Temperature is a measurement in Degrees Kelvin that indicates the hue of a specific type of light source. Many people believe the misconception that colour temperature is a rating of the brightness of the bulb or Hid kit . This belief is completely false. The reality of the matter is that the higher the colour temperature, the less useable light output you will obtain. A perfect example would be a black light. This light has a colour temperature of approx 14,000k and has almost no useable light or lumens output. Higher K kits such as 12,000k, 14000k, etc. have been manufactured for individuals that are more concerned about the actual colour output of their lights as opposed to the actual useable light output.
What is Lumen (lm) ? :
The international unit (SI) of luminous flux (quantity of lights). For example, a dinner candle produces about 12 lumens and a standard 60-watt incandescent bulb produces 830 lumens.
Omega Color (K) and Lumen (lm) chart :
3500K Gold Yellow 3,600 (lm)
6000K Pure White - Blueish 3,200 (lm)
6000K Pure White - Blueish 2nd Gen 4,200 (lm)
8000K Purple White 2,600 (lm)
10000K Pure Blue 2,400 (lm)
So if i'm reading it right a gen 2 Pure White wish blueish color is better than the Gold Yellow But they can make a better gold yellow.
I think it states ultimatly you want a lower K to get more light???
for all you smart folks out there slap me if im wrong.
Sorry found this information at
http://www.omegaxenon.com/index.html