Problem with Led lights are that the light they produce is very direct where as Neon is more diffused and cast more of a balanced glow. Leds will be more like spot lights and will not have the same effect.
Problem with Led lights are that the light they produce is very direct where as Neon is more diffused and cast more of a balanced glow. Leds will be more like spot lights and will not have the same effect.
When using LED's to light computer cases we typically use diffusers to spread the LED pattern, on a much-larger application, like an engine bay, you could easily get away with a series of LED's with diffusers mouted on them - light spread would be similar to a 'neon' light bar, but with the advantages of LED.
How do they diffuse it .... If I was to take a guess I would say with some kind of lens.