I used 2 strands of high brightness white wrapped together from
http://shopping.netsuite.com/coolight . I put it inside a .25" ID, .375" OD acrylic tube bent around a barrell of quaker oatmeal. You have to buy at least one inverter to power the wire, and solder everything together. I spent $25 at the coolight store, and $15 at a local plastics manufacturer for the tube.
Benefits include higher heat tolerance than leds, especially when inside a sealed tube. However, the expected life for the wire is only 2000-6000 hours. The white wire has a pink coating around it, so it gives off a true white with either a hint of blue or pink, depending on the time of day. Also, the wire doesn't require a return, so only a strand of speaker wire runs in, and nothing runs out.
$40 bucks a little creativity go a long way.
The wire works by carrying a frequency, current, and voltage from the inverter. Higher frequency means less life. The inverter does emmit a sound, like a humm, but it can't be heard with the car on.