So the whole top is glass except for the plastic hinge in the middle and the plastic strip in the back? If so, then scrap my idea because you already have a Versa-Top, lol!
I suppose you have 2 options to get more light into your tank. You could go with Neilanh's idea and buy another strip light, or you could look into getting a PC strip to replace what you already have. The problem with the first option is that you would need to put the second light at the front of your tank, where you would have to move it every time you feed your fish. If you don't mind that, then go for it. If I'm not mistaken, the 46 bow is a 3 foot tank, which probably means that you would need either a 20" or possibly a 24" strip so it would fit at the front of the tank, on top of the "bowed" part. The problem with the second option is that it's more expensive. But, if you have the money, you may be happier with a PC strip. Some even have built in moon lights, which you also might like. I'm not sure that the mounting legs would help get more light into the front of your tank, but I prefer to use them for looks, if nothing else- of course, that's just a matter of opinion. I didn't find that it made much of a difference in the way the light appears in my discus tank. The good part about a PC strip, though, is that it will be MUCH brighter than even 2 NO strips put together. It will also give you enough light to grow some species of plants, if your cichlids don't eat them, lol. I don't know if that's something you would be interested in, but I can help you choose one if you want.