Oh, well that's troublesome. In general, glass lids are a bad idea in marine tanks. They keep heat in (a major difficulty in the summer), and lower gas exchange to create an environment with low O2 and high CO2 in the tank. A problem made worse by the poor carrying capacity of seawater for these gasses anyway.
With a 10g tank, it's tough to come up with cheap lighting for it because of the small dimensions. Just not that popular a size for good lighting. Most folks start off with a 10g, quickly realize there isn't much out there they can really do with it, and go find something bigger, or try a pre-made nano cube.
You could try something like this 96watt quad compact. Or you could consider two of these 18watt compact flourescents and run them side by side over your tank.
With a 10g tank, it's tough to come up with cheap lighting for it because of the small dimensions. Just not that popular a size for good lighting. Most folks start off with a 10g, quickly realize there isn't much out there they can really do with it, and go find something bigger, or try a pre-made nano cube.
You could try something like this 96watt quad compact. Or you could consider two of these 18watt compact flourescents and run them side by side over your tank.