LED neon: Made from flexible silicone tubing with embedded LEDs; it’s more energy-efficient, durable, and safer (no gas or glass). Traditional neon: Made from glass tubes filled with gas (e.g., neon or argon); more fragile, uses more energy, and can get hot. 99% of the custom neon signs today use LED neon flex due to its modern benefits. If you’re deciding between the two, tell us where it is going and what result you want. We will happily recommend the simpler option when it is genuinely the better fit.