Hi Tylermn93, IMO if you want to have a good flow using lily pipes you really need a powerful filter, probably more that when you're using a spraybar. This is due to a less uniform flow (compared to a spraybar, so you need to ensure that the jet is strong enough to move the water all over the tank) and also due to real flow rate the pipes need to perform ok. Have a look to the online ADA catalogue, you will see that they are one of the few suppliers that recommend a flow rate for each lily pipe. It happened to me that I tried to use a lily pipe outflow (not ADA but similar) that needed at least 360 lph but the real flow I measured in my filter was lower...
However also notice that (if I am not wrong) your filter delivers around 1,000 lph, in a 50x4= aprox. 200 liters. If you follow the 10x rule, you'd need at least 2,000 lph. So, I would try to fix this issue before because it is quite probable that the spraybar won't deliver the flow needed (the jets must hit the front glass).
Coming back to the lily pies, if you have a look to some pro aquascapers, it is quite common to use two filters (each one with their lily pipes) in such tanks. This way you have plenty of flow and you ensure a proper water circulation by placing one outlet on the right foreground and the other on the left background.
Jordi