I'm doing this as part of a re-vamp to a cage that is being modified for my BRB. I had a set of cable lights for another project, and never ended up using them for it. Instead, this is what I did with them. It should be noted that I am using the heavy duty indoor/outdoor ones with a sturdy plastic casing - this way they are weatherproof, and thus should not be bothered by the excessive humidity in the BRB cage. Most of these come with a 5 foot cord for plugging it in - obviously, that needs to run outside the cage. I put it through a very small cord-sized notch in the back panel of the cage, near the ceiling. It is kind of visible in one of the pictures. We are trying to make the reptile room more efficient, because the power bills have gotten ridiculous. The cable I used is 18 feet long, and uses only 12 watts (less than many compact fluorescent bulbs). It costs about $20-$30. They come in different colors. I prefer the bright white over the warmer off-white colors. Most stores will plug one in for you to see what color it actually is. In addition to the rope lights, You'll need these (or similar device) and some screws. The mounting hardware/kit that comes with the rope light is worthless for this project. Just make sure the screws you use are not so long they would poke out the other side of the wood (Top of the cage). These are about $1.50 for a pack of 12. I used 3 packs for this project. . This is how they attach. Finished: It's hard to tell in the pictures, but it lights the cage really well. I'll try to get some pictures tonight when the ambient light in the room is a bit lower. The empty space on one end is reserved for a radiant heat panel. .