AHsupply has great retrofits and the best reflectors one can find. For bulbs, I and my plant geeks go to
http://www.atlantalightbulbs.com/
There are a few more sources for lights as everyone can find a good sale now and then but they carry the GE 9325 (my favorite bulb) if you ever want to try something different. 8800K bulbs are nice too. Your 10000K bulbs will work fine. YOur tank will appear whitish and your reds (if you have any) wont have that "pop".
My avatar is taken under a 10000K bulb. Its also grainy because of shutter speed and white balance. I can grow plants, just cant photograph them
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For in much wisdom [is] much grief: and he that increaseth knowledge increaseth sorrow.

Member of the AGA (Aquatic Gardner's Association)
Member of the IBC (International Betta Congress)