I'm sorry I can't answer your questions. I don't think that petco or petsmart is here in australia so I don't know what they have :S
And I'm not familiar with glofish so I can't help you there.
I got my light used on ebay. It's an Aqualina light and I got two of them for $300, with extra tubes and the other light doesn't have the moonlight.
You can always try nutters idea and use actinic tubes..they are blue, or you can probably get
LED lights or something for reasonably cheap.
You can always get proper moonlights by themselves or buy a light with a moonlight built in though that's starting to get a little pricey...