Weird. My 13 watt Trailtech HID went off partway into the commute this morning too but
it was because the battery discharged. Is charging now.
Right now we're just short of the lumens we want in an LED format. The Trinewt is 500
lumens (13W Trailtech HID is about 720-725 I'm guessing since they reported 30% brighter
than the 10W Trailtech HID which was 550) and there's a new light called a TridenX by
Cygolite that purports to be HID quality brightness.
So the only way you're going to get to the 700 lumens area is a custom design with multiple
bright LEDs.
The other bright LED light, of course, is the Lupine Betty but that thing is seriously spendy,
as in "new bike spendy".