i've used many over the last 17+ years, and here's my thoughts..
for such an important tool (i use it almost daily), i think there's
no need to cheap out on a headlamp.
first of all, let's talk about battery. i strongly recommend that you go with an 18650-based light. i personally do not find a light useful if it has less battery capacity than that.
forget those anemic headlamps!! they're a joke! maybe for a super tiny EDC light, i can understand some people wanting a little AA or AAA based light, but a headlamp is already going to be a bit bulky because of the head strap, so it's never going to fit in your shirt pocket anyway.
next,
do you require built in charging?
my views have changed on this over the years. it used to be a requirement for me. but now that lights are so efficient, i get a lot of runtime out of a single 18650 battery, and if i need more, i just bring a spare with me. they're small and cheap ($6). not having a built-in charger cuts down on the size and complexity of the headlamp. also, i have several 18650-based flashlights, and it's nice to not have that machinery needlessly duplicated in every light.
no charge port can also mean the light is waterproof. the only reason built-in charger still makes sense is if you're traveling for an extended period of time and don't want to waste luggage space on a standalone charger.
if you require built-in charging:
petzl nao (whatever the latest iteration of it is):
https://www.petzl.com/US/en/Sport/PERFORMANCE-headlamps/NAO-PLUS
petzl makes great, high quality stuff. i started out on some of their bulky 4xAA battery pack models back before LEDs dominated. when it made sense, i transitioned to LED and 18650 batteries.
i used the petzl nao for a long time as my main headlamp. the nao series features 'reactive lighting' -- there's a brightness sensor that senses how much light is being reflected back at your face, so if you're illuminating something very close to you, it will automatically dim the light. it's nice for outdoors stuff, but it makes no sense indoors. and yes, you can disable the reactive mode. so if that sounds cool at all, consider this light.
it has built in usb charging. the downsides? it's probably the most expensive light on this list, and reactive lighting may be just a gimmick for some people. also, although it is 18650-based, their batteries are proprietary and very expensive (around 10x the cost of a normal one) because they have some stupid mini-PCB attached to it. i've never bought spare batteries for mine, so in a way it doesn't matter, but if they were cheap, i probably would have.
armytek
https://www.armytek.com/flashlights/types/multi-flashlights-headlamps/
if you don't want a petzl nao because:
- too expensive
- don't care about its 'reactive lighting' feature
- want to be able to buy spare 18650 batteries for a reasonable price
probably the best headlamp with built in usb charging is the armytek. i don't own any myself, so i can't recommend a specific model.
if you do not require built-in charging:
my top pick is the zebralight H600w IV. this is now my main headlamp. cheaper, smaller, and lighter than the petzl nao. it uses inexpensive, non-proprietary 18650 batteries. very high quality and has industry-leading LED driver and tuning to give you top battery life. and you can remove the strap to use it as a small EDC light.
and it's very water resistant (IPX8 rating: 2 meters, 30 minutes).
another huge thing is the
user interface. it is very good and customizable. read up on it first! it's a little fiddly to program, but you only have to do it once. this is a huge part of why i prefer zebralight. there are 12 brightness settings, and you can program in 6 of them for easy access (at most a few clicks away).
the lowest brightness levels are surprisingly super useful and last months (!!) on a single battery.
zebralight has many models. it's confusing and took me a long time to get familiar with their lineup. they should really make it easier to understand..
first, you have 3 general choices in optics:
spot-spill (reflector that focuses it into a hotspot), floody (spot-spill but with a frosted diffuser to spread it out some), and flood (no focusing reflector, just a pure bulb, maximum flood). all my recommendations are for spot-spill. floody and flood just waste too much energy illuminating stuff you're not even looking at. floodlamp is good for a stationary light, not something fixed to your head that automatically points at what you're looking at...
H600w Mk IV:
- overall their best headlamp imo
- imo the best tint
- not ultra high CRI, but plenty good
- 4500K color temp
- 12° hotspot. a little narrower than the others, but still plenty floody imo
if you want high CRI options, you can look at
H600c (warmer light, 4000K) and
H600d (cooler light, 5000K):
- 17° hotspot. a little wider than H600w. acceptable, but 12° is better for me
hope that helps and am happy to answer questions