Howdy Ian,
Click here for a section from my site for the electrically challenged that covers your issues to include how to setup your light switch for what we call here in the US, a DRL (daytime running light).
Though your current dee-bockle has nothing to do with your mag, I'd use reasons even less associated than your recent experience - like alignment of the stars - to justify fitting a BT-H for which you can get a feel for its virtues here bearing in mind I have no commerical association, rather, am from a country rather known for embracing cults with enthusiasm.
Click here for a section from my site for the electrically challenged that covers your issues to include how to setup your light switch for what we call here in the US, a DRL (daytime running light).
Though your current dee-bockle has nothing to do with your mag, I'd use reasons even less associated than your recent experience - like alignment of the stars - to justify fitting a BT-H for which you can get a feel for its virtues here bearing in mind I have no commerical association, rather, am from a country rather known for embracing cults with enthusiasm.