One of those I my father's lamp these days. I am big fan of lightweight 2 led lamps. My old home made one was sort of like that, it was 2 x P7 light. And two years ago I moved to the type of lamps you see four here, pretty close to your 2 led one, just different clone (original is gemini duo or lupine piko I suppose)
But there is differences, those clones are not alike. The one you have is not that good what it comes to heat dissipation. Thermal path from led plate to body is pretty narrow, there is just little aluminum around screws led plate is attached to. If you open it I suggest putting some thermal paste to the tiny surface the plate touches the body..
In my lamp (genuine yinding) there is solid lamp body behind the plate:
so heat dissipation is much better, the whole back of the plate touches the lamp body.
In addition I have these days neutral leds instead of cool white. And I use 2 cell battery pack, ~120 g and good for 75min races and fades gently, still gives decent light for walking/jogging after 2 hours.
Let me know what you think of it compared to the petzl nao, especially for casual trail lamppulenkki style runs.