Greetings from England,
I have read this thread with great interest. I have the HL21 myself and would like to addif I may.
I find it an excellent performer for 'dynamic' activities,such as walking or running. The throwybeam shows the trail ahead very well, whilst the very good spill shows theground just in front rather well.
I have used it extensively for winter walking . Not sure if any of you guys in the US haveheard of a walk over here called the Pennine Way which is 280 Miles long, Iwalked a lot of this route last winter and the HL21 worked really well. What I really like about this light is thesingle AA format, nice and simple. Ireally can't understand why other manufacturers persist in using the 3 AAAformat. The single AA format means easybattery changes with cold, wet hands.
Sure, there's a few niggles. I agree with everyone's comments regarding the headband, silly diffuserand lack of 25 lumen mode. But I reallylike the 48 lumen mode for walking (and running) – the beam extends for a good useabledistance of about 50 metres.
If you are in camp, use a separate floody light (I have aZebralight for this purpose). The HL21is not an "in camp" light, rather it will get you to camp instead.
Don't remove the light from the clip supports, there reallyis no need to do this; as per reports above, the clips can fail.
A very interesting thread, thank you all.
Steve