Dim 41 instrument lights

[fortyonerag]

My 41 convert runs a stock 6V +ve earth system. As near as I can see, the instrument cluster uses two H55 globes for illumination.

I know my eyes aren't getting any younger, but when driving at night with the lights on I can barely read the instruments due to poor illumination.

I have bypassed the instrument dimmer and can confirm a full 6v at the globes. The globes work, but the instruments are still (squint and look hard) dim.

Does anyone else have this issue? Am I missing something?

I'm contemplating going to 12V, but would prefer to understand this issue before deciding.

Many thanks