I wouldn’t recommend running it on turbo for long. The 219B emitters have higher Vf than 219C, so they won’t allow as much current to pass… but they also can’t stand anywhere near as much current. So I’m not really sure what to expect.
It might be a good idea to artificially lower the FET power on the 219B version, but it’ll require some testing to figure out if that’s necessary… and I’m not really set up for that kind of testing.
With most direct-drive lights, the emitters and batteries are chosen so the battery’s voltage sag and the emitter’s Vf curve will intersect at a safe point. But when using stronger cells or weaker emitters or lower-Vf emitters, things get tricky.
5000 lumens? Wow! That’s quite a powerhouse on your forehead. I hope all the mass in the head soaks up a lot of heat.
I’d bet that a few of my night mountain biking friends would appreciate that kind of power. They ride year-round. It would be great in the winter with the cold keeping the light from stepping down too quickly.
If you’re looking for a right angle light, this one looks to be top of the heap. Even without the HI leds, 2500 lumens is nothing to sneeze at.
Beam profile is throw-ish in optics. Broad but focused hotspot, very subtle cool band around edge of hotspot. Tint from factory will be slightly green from factory, but with a minus green filter it’s perfection. Deep red rendering is off the charts, better than 219B R9080. Even without the minus green filter, wood tones look great, but with a minus green filter, nothing does it better.
Thanks. Might try those then. But I’ll probably also get one with 219b’s since I know I’d like it. Which minus green filter do you use? And would it be able to handle the heat from this light?