Love t5s hate aquatic life as a brand name why not go both get a combo light you could find one on here second hand for fairly cheap. I would have to agree with Steve in those two I'd take the t5 I run a 33with just a halide but it's a high end bulb 20000k the brightest I've ever seen for color and is quite costly(price of s fixture lol)I would seriously consider paying good money for a quality light than selling it layer fir 1/3 the cost just to upgrade anyways, everyone does it myself included and like Steve said it will cost you way more
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cheers