Eclipse retrofits?

[Llarian]

Figured I'd ask here, even though this isn't a reef specific question, it applies to nanos. =)

I bought my girlfriend an Eclipse System 12 for her daughter's birthday, and she'd like to do a small planted tank, but there's really not enough light from the stock 13W bulb. Does anybody know of a retrofit for this tank? I've seen retros for the System 1/2/3, but they're rectangular which makes it easier.

Thanks,
Dylan