Steadfst
Update.
The headlight was fine for a while so didn't get around to putting in the new ballast.
However recently it's started doing it's thing again so i dropped in the new ballast just now, only to have the headlight do the same thing and the ballast seem to make a beeping/buzzing noise
As yo can see it buzzes whilst on before flickering out?
Have I just been unlucky and bought another bad ballast or is there something else going on?