On Thursday, December 15, 2016 at 6:42:38 AM UTC+13, John Carlyle wrote:

I don't understand what value there might be in mounting a bike strobe on a glider...

I'm not at the point of claiming a benefit for bike lights on gliders. But I've observed how I react to strobes on planes. I don't see the plane unless I point a narrow cone of acute vision right at it. The strobe gets my attention in a wider cone of vision, and when my eye sees the flash, my eye shifts my visual cone and I see the plane.

Scenarios where a flashing LED light might help in some instances:

1.Flying cloud street
2.Flying ridge
3.Planes landing/launching from opposite runways at uncontrolled airport.
4.For an overtaking power plane (rear facing light).