2700k is the color temperature of the light. That is different than the wattage or power. You can get the 2700k CFL at a local hardware store or some such. My local walmart didn't go that low unfortunately.
Cannabineer - I've read that thread and a couple of others on running coral t5 bulbs before, it really peaks my interest. I haven't compared the light output to the pl-l lights though.
I personally went with pl-l or 2g11 bulbs myself. They put out more light than standard t5 bulbs of similar size or wattage and much more than CFL's. They produce less heat that a hid system I believe.
Don't skimp on your ventilation and carbon scrubber.
Edit: I think he means this
http://www.enviro-gro-lites.co.uk/250w2700K+SLR-PG.asp which is just a 250w 2700k CFL
What is the dimensions of your space?