I second the Current USA lights. I use three of them, daisy-chained over my 6' tank. I took two pieces or corner molding, stained them the color of my stand, and attached them together to form a strip to mount them in. I drilled one small hole for the power cord to exit through in the back and I sit the little DIY contraption on top of my tank glass. Very simple, clean look and I am very happy with it.
I bought a 4ft LED moonlight strip (actually 2 2ft strips cabled together) from a seller on eBay called DiGiKits. It's been flawless and looks great. He sells them with or without a dimmer switch. I recommend the dimmer switch because it allows you to control the intensity. I paid about $40 + shipping, give or take.