refugium lighting

[Jaws]

What lighting would you reccommend for a 15" wide by 24" long by 24" deep refugium?

I'm thinking either this one:

http://www.jlaquatics.com/phpstore/s...ID=pc-alf24065

or this one:

http://www.jlaquatics.com/phpstore/s...ID=pc-alf24130

I'm not affraid to spend the extra money for the double strip but the question is "do I really need it" considering the tank is only 15" wide?

Does anybody have either of these lights used by any chance?