12 gallon Nano, came with a PL-24W 110V +10000K light.
I don't love the look of the light but how's it going to be for plants?
The 6700 bulb is only 9.99 but with shipping 18.98 so if the plants will grow just as well with the 10000K I'd just as soon wait on replacing it.
I use a 10,000k bulb on my tank, even though the only plants are dwarf tropical lillies and java fern (and moss!). I am quite happy with the crisp, neutral colour and I plan to use three 10,000k bulbs on an upcoming 6'x28"x3' tank. These may be suplimented with a couple of pink growlux fluros to bring out the reds in the fish if the MH alone is too harsh.