what kind of CFL will be best??

My plants are gowinfg outdoors but the light there is insufficient so Im gonna buy CFL. I was wondering which one is better, the yellowish or the white one??? Also Im probably going to buy philips equivalent to 150w I think it was 25w energy saving. Do u think thats enough for two plantz.
10x guyz

ummmmm, dude, how can there possibly be not enough light outside? and why would you want to replace the sun with CFL's?

There is only 4-5 hours of direct sunlight on my balcony. Im going to mix the lights. The plants are not in the soil they are in pots. Do u think one CFL which represents the 150w normal lamp will do??