18Wx16lx32hWhat are the dimensions of it? You might be able to put some softies or LPS in there.
Regardless of the dimensions, two 24 inches T5’s over any 40 gallon tank would be pretty dim. I’m assuming this is a narrow, deep tank.
what about keeping the T5's with all Actinic bulbs and adding 2 par38 Leds from home depot that should do it.
http://www.homedepot.com/h_d1/N-5yc...d=10053&langId=-1&keyword=par38&storeId=10051