I've fitted the new BUMM IQ FLY E that works with batteries between 6
and 42V for use on electrified bikes. It is essentially a CYO R in
different packaging, with protection circuits, and a passthrough
controller for a dumb rear LED light. (Except the Linetek lights
aren't dumb, they have stand lights, and I don't see the point of auto-
switching sensors if you're going to keep the light running day and
night anyway, as I do.)
I've also fitted the new BUMM Toplight Line Plus.
They're good too as daylight running lights.
There are photographs at
http://coolmainpress.com/BICYCLINGbuildingpedelec5.html
and more are coming when I get a chance to shine them against a wall
with comprehensible height indicators (otherwise known a supermarket
carpark in the middle of the night).
Andre Jute