Does this issue happen on any detail level on Roblox Studio?
If you reduce the brightness of the neon material (darken the colour of the part, e.g. blue → dark blue) would the blur reduce the impact it has?
Does the neon’s blur change regardless of any changes made in the game.Lighting.Technology property?
Does this issue specifically happen in that studio in particular? If it’s not, then it may be a possible issue with the graphics card not entirely supporting the lighting it produces out of the neon blocks. This is just an assumption, honestly. There may be more depth into it than I can guess.
Happens in-game aswell, nothing wrong w/ my graphics card others experience it also, nothing with lighting changes it, nor colors and I have my graphics all the way up just the neon for some reason.