See here for more on how to wear neon without looking too flamboyant.
And let's recall your basic knowledge on geometry. There are two types of line: vertical (top to bottom) and horizontal ( left to right)
In fashion these lines are coined as stripes. They say if you are quite gifted with love handles, horizontal stripes does not suite you, cause it will widen your shape, worsen your shabby look. Vertical stripes will help petite ones appear taller, and make 'healthy' ones look slimmer.