Friend, let me save you a lot of time and money. Unless you are willing to commit at least $1000 to the hobby, and replace the tank you have do not even being to think you can do a reef tank. Any LFS that tells you differently is just trying to milk money out of you, and does not care about the life of the livestock they are selling.
You could convert the tank you have to a fish only tank, for much less money at which point you are looking at lighting for the fish, who need some light but it can be 1/4 - 1/10th what goes in to a successful reef tank. For a fish only tank you may be able to just get a different bulb for your T12 fixture that will grow less algea. Perhaps someone that knows T12 better than I could comment. Take the money you save here and put in to an RO/DI filter, you will need/want it in the long run.
To answer your direct question if your tank does not have a large black plastic brace across the middle then you cold consider something like
the Reef Breeders value fixture.
I have a 38.5 bow front 34.5" long, that I convinced myself I could convert because it was already drilled and had T5HO lighting. I am really having a hard time finding affordable lighting for it as it is a non-standard size with a large brace in the middle. The tank came with dual 24" T5HO lights, but after some research and a visit from a new friend with a light meter I found they are nowhere near enough for a reef tank. To accomplish moderate lighting I need to at least double the number of T5HO bulbs, and the only way to do that is to build a custom hood (thanks to the bow and the odd length). As it stands I am very strongly considering using Power Compact bulbs in the custom hood despite the fact that they cost more, are considered out dated by most, and have to be replaced more frequently just to get some extra wattage in to the tank.
That is just one of my projects, the other is to replace the sump I made to something larger to support a "real" protein skimmer. I designed my sump around the Hydor slim skim, since the stand for my tank has an internal load baring divider. While the Slim Skim works (fish only at the moment) it will not be able keep my water clean enough for a reef tank given the bio-load I will have at that point. Then I have to replace the canister filter I am using as a media reactor with something actually intended for the purpose. I should have held off myself, but I thought I could make it work. In the end I probably managed to "waste" $300 - $400 on equipment that I will be replacing.
If you are willing to commit the money up front then I recommend starting with a new tank, designed from the ground up to be a reef tank. Go with a standard size tank so you can take advantage of the equipment that has been designed for the standard sizes and you will save some money. You can then put the money you save in to other aspects of your setup which will need it.
