A lot of the lamp failures I see involve a bolted fault between the stanchions that hold up the filaments. Next time you have one of these carefully break the envelope of the bulb and I bet you will see them welded together.
I don't know what this fault current is but it often trips the breaker.
The fix is probably better lamps but I am not sure where they would come from. Everyone is building to a price point these days, not a performance standard.
An alternative fix might be some kind of supplemental over current protection but if it takes a service call to replace the fuse, you didn't really save much.
