12,000K, 10,000K or 6,500 premium white daylight?

Which bulbs for my 75 g planted tank?

Its time to replace my PC light bulbs. Im currently running the 6400 and the daylight 12000. The 6400 appears brighter than the 12000, two of each in my 260 w strip.

Which to choose...

Please list in order of which you would choose, first choice and last choice. As well as what you would reccomend..

Thanks!

Blue