Lighting question???

[365seasons]

My husband and I are trying to find lighting so we can eventually start to have some low light corals in our tank. It's a 55 gallon, with live rock and only a few fish and inverts in it at the moment, but it is a column tank.

The dimensions are 20"s wide by 30"s tall. We were thinking a T5 lighting system and were wondering if that is the best way to go. If so, if there are lights with a width that short.

Any input on this would be greatly appreciated. Thanks in advance.