lighting for a 2.5 gallon

[Aside]

I have a 2.5 gallon mini bow filled with low light plants. I don't really know the names of all of it, it is a mixture of stuff from a package from a user on here and some stuff I picked I at petco.

I picked up one of those 10w zoo med bowls and was wondering if that was adequate light for a tank this size. I remember reading that the watts per gallon doesn't really hold true for nano tanks so I'd like the opinion of all of you.