Actually the tubes arnt as good as they waste so much light. you'd be paying for light that your plants arnt reciving. It's better to use cool CFL's for veg and warm ones for flower, but i'd really look into a HPS which will give you a great yeild and look into cool white CFLs for veg.

I mean tube light do the job fine, but its just the thing of loosing so much light.

Although tube light can provide excellent side lighting for tall plants.