(NB this post will be edited as I acquire more lights.) I first got into this hobby with headlamps, and remember Sofirn D25L with fondness as it was first time that I saw actual description of the LED used, Samsung LH351D, on Amazon. Hence the realization that I needed to investigate. (That was about 20 flashlights ago. 
)
The hobby obviously took a left turn from max brightness to max beautiful beam. I’ve read hundreds of reviews, bought a few excellent lights, but this headlamp hobby seems to be at the end of the road now with Convoy H2 and the ultimate LED lol, Nichia 219b 4500K. Only Convoy would be brave and nutty enough to do something like this, and the result is - how could it get any better?
WRT brightness, as with all the Convoy lights I have, prolonged brightness is the hallmark. It makes Convoys lights the very best for walk light for me.
Weights of headlamps with battery:
Fenix (16340 battery) - 1.9 oz - 55 gm
Skilhunt H04R RC 3.4 oz - 97 gm
Sofirn D25L 3.7 oz - 105 gm
Convoy H2 4.4 oz - 126 gm
Coast XPH30R - 4.44 oz - 126 gm
Fenix HM65R-T 4.83 oz - 137 gm
Reviews:
Skilhunt HO4R RC: Flux 350 lm. Throw 84 m. The star of the 18650 shows because of its extreme light weight. Mine has Nichia 519a 4500k version which has gorgeous beam color that’s on the golden yellow side, but output is on dim side. Magnetic charging is a plus (quick) or minus (not USB-C means another wire on the desk and during travels) depending on how you look at it. The headband it comes with is beautiful and designed in such a way that it could be removed quickly.
Convoy H2: Flux 580 lm. Throw 155 m. (3500k throw = 146 m) Overall this is the most favorite of all my headlights. I have two H2’s:, one with Nichia 219b 4500k and second one with Nichia 219b 3500k. Considerably brighter, and heavier, than Skilhunt. Headlight above 4 oz needs a headband with overhead strap. You have a choice of 4 straps: Convoy ($6), Skilhunt 1, Skilhunt 2, and Olight.
Sofirn D25L: This is consistently one of the most comfortable headlamps to wear. It has a fantastic floody field that is very useful and is my favorite for work around the house. My D25L model has LH351D and unfortunately I lost the tint lottery here: this is the greenest LED in my collection (similar to SST20 4000k in its green tint, meaning very bad). But still I use it very often because of its non-glaring and wide floody beam.
Coast XPH30R: Throw 211 Turbo, 144 High. A zoomie and I actually love it. It’s the best for camping for example where you could adjust to flood while preparing diner and change to throw when walking to water source. I place specs for Hi level because this light step-downs and doesn’t recover well when you use Turbo mode. Hi is much better.
Fenix HM65R-T: Flux 710 lm (the SST40 LED) Throw 143 m. Dual LED: Luminus SST40 White and XP-G2 R5 Neutral White. Probably my least favorite headlight, because of its weight and cost and poor design. The headband is cumbersome and does not have overhead strap, a big problem for me for this very heavy light. To make matter worse, you can’t remove from the light from the headband if you like to try third party headbands. I don’t like the dual LED design and rarely use the flood part, but this is personal preference/YMMV. Beam colors are so so. Construction quality is first rate and output is great, but personally I would pass on this one.
Fenix 50R v2: A little light weight gem for use around the house. Cree XP-G3 S4 “White” is cold bluish.
I over-exposed the shot to show the faint ring outside of the traditional hotspot and spill of Convoy H2 4500K. Don’t think of it as a flaw, think of it as bonus extra spill 
. Kidding aside, yes visible on OCD white wall hunting, but invisible in real life use (it’s too faint and outside field of vision). HIGHEST recommendation.
