Thanks for sort of answering my question.
It seems:- when I fly at weekends no RIS is available. Below 2000 ft a non transponder a/c may hit me, or a transponder equipped a/c not looking out may hit me. A microlight may hit me anywhere, and a glider could hit me at high altitude, even above the cloud. And even if I look out all the time I will miss an a/c on a direct collision course. Unless I disorientate myself by flying in circles.
If I fit a mode C/S transponder the risk to myself & others is reduced, but a Zaon unit could only give warning of the relatively small number of transponder equipped a/c in my vicinity.
Back to strobes and the new LEDs.. are they useless, or could they give just enough extra visibility to make a life or death difference?
