Is the Dark Side stronger? Yes Luke, yes it is.

[Jorlem]

By the movie canon, there's no such thing as a 'Light Side' of the Force. There's just the Force, and the Dark Side, which is a corruption of the Force. A lot of the EU authors didn't understand that, so they thought of the Dark Side as being opposed by a 'Light Side' that were opposite and equal to each other, instead of the Dark Side being a sort of 'tumor' on the Force, that twisted and distorted it.
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Stand between the Silver Crystal and the Golden Sea.
"Youngsters these days just have no appreciation for the magnificence of the legendary cucumber."  --Krityan Elder, Tales of Vesperia.