trying to find replacement t5 bulbs


Reef Junkie
So I'm trying to find a replacement bulb for my t5 lighting on my 10 gal. I want to replace one of the white bulbs with one that puts off a purple or pink hue so I can get some better color out of my corals. Right now there are 2 blue and 2 white.

This is a picture I took from aquatraders ( where I got the fixture) but they do not have the bulb I'm looking for. Anyone know where I can find what I need? Thanks!
Thanks but I'm having trouble finding just one bulb. I clicked the link and it just downloaded the light info to my phone. I went to the website and couldn't seem to find single bulbs.