Under CTT rules in the UK, when you ride time trials it is mandatory to run front and rear lights. Rear isn't a problem - it will always be my Garmin radar. But for front it would be best to have the smallest possible light, tucked out of the wind, ideally via a Go pro style mount under my Garmin. Performance isn't really a concern - there is no need to use it to see by - and as long as it lasts a couple of hours on flash it would be fine. I've got a Xoss XL800, but that is much chunkier than ideal (and also been quite disappointing in terms of performance - not that I care about that for this use!). There are literally thousands of bike lights in AliExpress but I can't seem to find much that fits the brief - anything that mounts using Go Pro style mounts tends to be a big "to see with" light. Anyone got any suggestions?