over tank lighting for aquaone 850.

[ste76]

Hi guys, hope you can help. I am about to convert my fresh water tank into a reef tank. I have an aquaone aquastyle 850. I have the filtration and protien skimmer sorted out but im struggling to find a over tank light unit that will fit my tank. For cost reasons I would prefer a t5 unit as the led units are still quite expensive. The length of my tank is 32.5" or 82.5cm.
Any suggestions would be greatly appreciated

Thank you