need to replace T5 bulbs

[kirkland]

we need to replace our 6 geisemann 39W T5 bulbs. the bulbs we had came with the tank when we bought it new 1 year ago. 2 each of pur actinic, aquablue and midday I believe. any advice on where to purchase bulbs? would rather do it online than at a store, and we'll probably get a combo of ati/geisemann. we have a sebae, shrooms and LPS only so any advice on specific bulbs to get would be great.