You can use T5 HO
lighting. You just need to get a very strong light fixture. Something with upwards of around 6 or 8 bulbs. I know Current USA have some T5 fixtures with 6 to 8 bulbs. However, MH
lighting may be a better option for you since you tank is pretty deep and pretty wide im assuming. With MH
's you will definitely be able to keep nems, but with the T5 in a tank that size, i'm not so sure. But then again, i'm not an expert at lighting, just relaying some of the info i've seen here to you.