Hi Norm
I wouldn't be putting up with that ,I would try an accessory light switch then totally re wire the globes to the switch,
otherwise I'd be wiring in some spot lights . I'd even put a dipper switch on the floor for high beam.
I wonder if too many electrical items draw from the one fuse so the fuse is higher than it needs to be for just the lights.
The more devices on a circuit, the heavier the amp load.
Older cars never had this problem but had less devices on a circuit.
Has to be a reason why this happens ,I'd even try old globes from nineties model cars just in case the
globes are shoddy these days.
I know when they went to lead free solder (This law took effect on July 1, 2006) there were all sorts of problems with electrical items.
https://www.tandfonline.com/doi/full/10.1080/14686996.2019.1640072Cheers
Max
