This can really come down to each persons individual preferences and the type of visual effect your trying to setup.
Generally with neon car lights you can only turn them on and off without any of the other visual effects. Now we do have a music interface available that you can hookup to your neons that do give you the ability to have the neons strobe with the music and such. But this is an extra module and generally isn’t included with neon lighting kits.
In comparison with the LED car lights you get more dazzling effects. You can make the lights fade, chase, strobe, have multicolors, etc. All which you generally cannot due with the neon kits.
Also the neon tubes are very bright but are more fragile than their LED counterparts. The LED tubes are more durable and are harder to damage then the neons. Of course either way you have to watch out for speed bumps.
Both your neon and LED lights will last years if they are taken care of. But LED’s do have a much larger lamp life than neons and draw approximately 1/3 to 1/2 the amount of power compared to the neon lights.
The last thing is that the LED underbody kits used to be dimmer, and produce a kind of dot effect compared to the neons. But now the LED kits are just as bright as the neons. This has been accomplished by adding alot more LED’s into the tubes.
