Bat and alt is fine, runs as 13.5 on acc and 14 when the car is on.
I think i may have found the problem. The 'spades?' that connect onto each globe terminal were tight each time i fitted new globes, but come loose when hot. so I've made them tighter and all seems to be ok, except for buying 1 dodgy globe that came loose in it's casing after a few weeks weeks
and they're just the standard 55w globes, not white or blue