One of my favourite items in the game to use as accents in my builds is the Neon Bar.
However, the colours often leak through walls due to the attached light radius and disabling the radius removes any colour from the neon bar.
I think it would be really useful to builders to give an alternate Neon Bar that allows them to recolour the Emission but has no attached light source. This would also function as a more optimised version of the Neon Bar especially when building with them in larger quantities. Using Bloom on the emission could help give it the appearance of light spread without a light source.