I don’t have an accurate way to measure amps over about 2 or 3, but if I do a math-based estimation, here’s what I get:
- 1720 OTF lm measured on an Efest 18350 cell
- 1720 / 4 = 430 OTF lm per emitter
- Add ~10% to cover optics losses: 473 emitter lumens
- Check djozz’s 219B measurements
- There’s a data point at about ~473 lm and 2.4 amps
- 2.4A * 4 = 9.6 amps
Or, without the 10% optics boost, it looks like it’d come out at about 8.8 amps.
So, I’d expect a measurement to be somewhere near that. It’s reassuring to hear that others have measured 8.5A to 9.0A with the same light and battery.
It’s not a direct measurement so don’t put much stock into it. However, I’ve found in the past that similar estimations tend to come out very close to reality, thanks to the high-quality data djozz provides.
Edit: I haven’t attempted a measurement at 30 seconds. With this much power in such a small light with a small battery, I doubt a 30-second turbo measurement would mean much. The output curve almost certainly has a steady decline all the way from zero to when the cell runs dry, and it shouldn’t really stabilize anywhere. That’s the nature of direct-drive hot rods, especially with the heat and power limitations of something so small.