Well I went there today.
The full story is a light fitting in the kitchen is blowing lamps almost every day, but they don't just go pop, they physically explode, usually with the glass bit shooting out and smashing on the floor, leaving the metal bit stuck in the holder.
The offending light fitting is a fan light, with three 60W ES lamps.
The guy from the Hydro (investigating why her bill is so high) told here it "must be a surge on the light fitting"
She says she hadn't used that light fitting for weeks now as she's afraid of it and has noticed a big reduction in her bill. The fan bit is turned off.
Anyway I could not find anything actually "wrong" Voltage is okay at 235V, no loose connections etc.
So after some discussion I changed it for a different light fitting (a spare one she had new in a box) No fan, and just a single 60W ES lamp on the new light fitting.
I honestly don't know what else one is supposed to do. She swears she has tried different makes of lamp from different shops and they nearly all explode.
Needless to say none exploded while I was there and even the old fitting appeared to work normally.
She also claims a 2D fitting similarly exploded with the lamp jumping out, only saved by the glass cover catching the lamp. :C