Penn Plax FL 40 vs. Power Glo

I got the 8000K at my LFS. They were very inexpensive compared to the other bulbs there. They are made by All Glass. I saw some pictures on line last night that showed tans with 6500K lighting and tanks with the 9325K lighting. I guess that is what has me intrigued because of how much nicer it looked.
 
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