The ballast in one of our oldest florescent lights finally died, so I thought it would be a good opportunity to replace it.
The wiring was a bit of a jumble (I should have taken a photograph).
We have a main light, with 2 switches (upstairs and downstairs), then next to that, a second smaller light with a separate switch to operate that independently, which looks like it is wired to the main first light. But I'm not sure how to attach it.
I understand the 3 red wires all go together, and the three black? But where do the 3rd set of black and red go? :( ...I'm guessing they might be for the second light/switch?
The picture below is of the wires which were attached to the main light, and below that is the connections to the new florescent light.