Choosing a light

[FishontheRock]

Im a little restricted as to changing my light for my 10g planted. I cant afford to upgrade my light fixture which is a basic 1bulb 15" t8 fixture. I picked up a life-glo as a hold over but the fellow at the store told me he could order in just about anything I might want.

So, with that in mind what would be the best tube to use?

 

[mohican]

My recommendation is anything under 10k.