The longest side of the sign is. It's a kind of very bright, eye-catching LED sign. Sign Type: Indoor Neon Sign and. We are proud to release our latest work of the latest 3rd generation high quality LED sign, which would be the best replacement for the regular neon sign in the future. Due to its natural superiority. It's SUPER BRIGHT with its latest LED bulb which matches that of a regular neon tube. It's very economical to use it in a long term. It's very thin and cute too. Comparing with the expensive large neon sign, the price for the same size LED sign is a lot better. It's...