I would be grateful for some fresh thinking with this.

We have problems with the towns christmas lights but only with one particular product type.

The lights are Festive Connect Pro - fairy lights with a flash bulb every metre or so.

Every circuit is supplied by its own rectifier/driver through a 16 amp type A RCBO.

The RCBOs are housed in a IP67 manufactured events board.

Four circuits have now failed - two of which failed since working perfectly last night.

All other circuits without the flash lamps but from same manufacturer are working fine.

Have we missed something with the flash lamp business - do the rcbos not like the product ????

The lights are in their fourth christmas season.

The RCBOs are Chint branded as supplied.

Its an umetered supply, used for christmas only.