On Sat, 20 May 2017 16:07:33 +0100, R D S wrote:

Both tubes in a flourescent are flickering and won't light. Reading up
on the symptoms suggests the ballast at fault but there's two of them so
unlikely they've both failed?

As the only thing in there that there's only one of is a capacitor, is
it likely to be that at fault?

I had a twin fluorescent unit that flickered a bit for all of its
life. I recently fitted LED retrofit replacement tubes and I am
delighted with the result. You do need to know whether the ballast is
magnetic or electronic as there are different versions.

I seem to recall my posting creating a surprising level of controversy
in this group.for some obscure reason.