Thinking of adding another fixture, what will this accomplish?

[hops523]

I have a 20 gallon high with one T5 fixture. Its a nova extreme 2x24 watt bulbs. I currently have a frogspawn, candy canes,trachyphyllia brain, kenya tree,zoas, maze brain(still dont know if it really is a maze),mushrooms, and a pagoda cup coral. The candies have started to grow new mouths,the zoas have spread like crazy since Ive had them,etc. If I added another nova extreme 48 watt fixture,would that do anything? Would I be able to keep more high light coral? If so what type? Would I be accomplishing anything with adding another light?

 

[wangotango]

Instead of buying another fixture, I'd save up and buy one better fixture like a TEK or something else.
-Justin

 

[hops523]

Oh I gotcha. Would you say to get the same wattage? If Im getting good good growth from the coral is it really necessary to buy a different fixture and not use my current one?