10,000k tube lights -- translation???

I am looking at getting a 15gal tank and an Eclipse hood that has built-in filtration and lights -- the lights it comes with are 18" tube lights, but I need better lights than the standard fluor. bulbs if I want to keep anything like mushrooms or xenia or kenya tree alive.  I found a listing on ebay for 10,000k tube light bulbs, and they claim they're good for corals too -- are 10k lights good enough for coral, or do they have to be 50/50 (I don't even know what that means), and what do 10k's look like?  Can anyone smarter than I am explain, once and for all, the difference between the diff. light temps and what they're for and what they look like?  Thanks.

K is the color of the lights.  10k (10,000k) is usually really white light, 14k is a little blue, and 20k very blue.

I have a ten gallon with ONE 16 watt NO tube light (50/50) on it.  I've got ricordia sending off runners and splitting in that light.  I've got xenia doing the same.  The rock below them puts the corals within a few inches of the light.  I've had mushrooms reproduce in that light as well.  Now, in my new nano, there's 48w of pc light and the xenia pulses lots faster, and the little leather starts have better polyp extension, but for the most part, normal output  doesn't seem to slow things down too much. 

I like the run-of-the-mill and the uglies.  I'm not picky on corals.  I'll post some pics in corals one of these days from the N.O. lit tank.

Mostly I was just checking to see if 10000k lights would keep corals alive and wouldn't be too yellow or ugly of a light...