All my switches were very dim so i decided to replace the fiber optic bulb with a super bright led. This was a complete waste of my time. Made no difference at all. Just thought i would inform everyone in case someone was thinking of doing the same.

 

Hmmm,
I replaced mine with a 5 element unit that vastly improves illumination.

(';')

 

That is exactly what I used. Did nothing for brightness.

 

Have you checked for breaks in the lines? Cracks will bleed light.