I might have, but my plant bulbs are 6500. I read this:
1,000 K: oil lamp
2,000 K: tungsten lamp (ordinary household bulb), sunrise and sunset
3,000 K: studio lamps, photofloods, "warm white" fluorescent lamps
4,000 K: clear flashbulbs, blue photofloods, "cool white" fluorescent lamps
5,000 K: blue flashbulbs, electronic flash, average daylight
6,000 K: bright midday sun
7,000 K: lightly overcast sky
8,000 K: hazy sky
10,000 K: heavily overcast sky
If this were true, why would someone want 10,00K for their vivarium if that simulates heavily overcast skies? Unless you were keeping low light plants? The spectrum seems to be almost the same with the 10,000K giving off a tiny bit more blue.