My elderly, partially-sighted father has just phoned with the news that when he switched on a double-tube fluorescent light fitting this morning it emitted a sharp, loud noise ("more of a crack than a bang") apparently from one end, then flickered and died. He tried it again and it lit normally and stayed on.
What does this indicate? The tubes were replaced a month or so ago, after the old one had noticeably dimmed. The basic fitting is around ten years old and has never given trouble before.
I need to get this sorted out (and the light replaced, if necessary) fairly sharpish, so any advice would be welcome. Many thanks.
Bert