[Insignia 2014 cdti rumbling/misfire when accelerating]

Hi, this has been on for an about a year on and off but recently it will not clear when revving hard, I am thinking possibly an injector fault? 

[Poor visibility front headlights]

Hi, can anyone recommend any decent bulbs to get for a 2014 insignia? I have tried some LED’s that I got and they are worse than the standard bulbs