Light Emitting Diodes use no bulbs or gas so they will never burn out. Neon has the most consistent glow because there are no gaps. If you purchase a good quality LED set, that's the way to go because they will be bright enough to cover the gaps, showing no overlay. Neon's are easier to break and more prone to vibration resistance, but are generally found at a cheaper price. To do it correctly for a long time effect, go LED.