One “failing” of the ’02 is that when you activate the IR-thingy, it snaps on to full-tilt and off, not the last memorised brightness level. So that’s how I make sure it’s at 100% when I want it, just go to IR mode and it’s at 100%.

Dunno the D10, so can’t compare. All I know is I got a bunch of ’02s, thinking them to be “disposable”, but I’ve been banging on the first one all this time and it hasn’t failed me yet. Even things like shoveling snow (well, more like chiselling ice), I had it on its lowest setting and it was still plenty bright reflecting off the white snow/ice.

I got a whole bunch of TIRs from Amazon, and I’ve swapped acto my needs. Usually, the 60 is what I keep coming back to, as it’s nice and floody but still lights well farther out when you crank it up.

If your interest is to use it while hiking/running/jogging at night, the come-with TIR (30°?) is fine.

But yeah, any 20mm TIR (LEDsupply, Amazon, etc.) will drop right in.