Are you going to add anything else to get flow?
As Puttputt says, the spraybar will cause problems, and if it is close to the lighting, it will splatter all over the covers of your light fittings.
What sort of rockwork are you looking at as well, if you use diffuser or egg crate or make your own out if thick acrylic strips to sit your rock on you could look at the return from this system with the spray bars being under this, and then having a stream to keep the water moving higher up the tank.
The little shelf over the fuge may hinder access to it as well - how much space is there under the lights to the top of the fuge?