If you're talking about rope lights like my blue one above, you should be aware that they're not constructed with LEDs. They have little incandescent bulbs in them (or at least mine does), so it gets very warm after running for a while.
If you can, make sure you're getting an LED-based solution.
Bump! Bee0912 and ravio11i...any pictures available? I'm going to Lowe's tomorrow to figure out something. I'd love to see your set ups. I also have a 6 footer I'm trying to light up..