i went to my local B&Q (diy store if your not in the uk) and bought some daylight tubes, about 1/3 of the price of "fish/plant" bulbs and worked just as well
For anyone in doubt about normal tubes, my plants were pearling under these
OP light aint the only thing you need for healthy plant growth. What plants are they and whats wrong with them? thers a link around here some where explaining the reason for dying plants and what they need