would like to get into what you like to carry and why in terms of woods use. Even weapon lights and that sort of thing. Pictures always welcome of course.
Do you have multiple lights? or prefer one to take care of your needs?
You mean when being in the woods in general? (hiking/hunting)?
Personally, I'd consider bringing just a single light to be dangerous, even if it's a high quality one with full battery and spares. Unexpectedly loosing all light while deep in the woods can turn dangerous pretty fast.
There are certainly members here that have given this more thought than I have, but my current thinking is:
Three lights pr. person. One headlight (1x 18650 or 2-4x AA), one good flashlight (18650), and one smaller light (AA or AAA). The idea being headlight for walking around, flashlight as backup, and the smaller as an always-on-person backup.
Flow/throw and power of them up to individual taste, and willingness to carry spare batteries.
For the headlight, I'd prefer something with a bit of range, but more important is that it's enough flowy or has enough spill that I don't feel like I'm loosing peripheral vision. At the same time, too much spill can lead to easily shining other members of a group in the eyes, both annoying them and killing their night vision. While range is nice, the light from the headlight can be supplemented by using a more throwy light for the 18650. A momentary on flashlight with a decent holster would be nice for this. Having a bit of flood on the headlight also makes it much more useful for usage around the camp, at lower power. There's always the option of carrying a second headlight for camp-use, but that would bring the total number of lights to four, and as long as some flood is good for walking around as well, it just seems unnecessary.
For the "always on me"-light, I'll swap out my EDC using AAA, for an AA light. That leaves me with just two types of batteries (18650 and AA), and a single four pack of eneloops would be enough for one change of batteries in the GPS, and two in the smaller light.
Still not found the perfect headlight. In addition to being picky about beam, I'd like to be able to both go directly to a medium mode giving 10 hours on a single 18650, yet enough light, and also directly on to low red. Killing a groups night vision when sharing a tent is never popular. ;-)
I might end up with two headlights because of it. That also gives the option of more flood for camp usage, and more range for walking around.
Edit to add; While (IHMO!) the three-light setup is probably good as a generic recommendation, the tradeoffs are a very personal preference-kind of thing. I know people that are very creeped out when they can't see far ahead where they're going, and I know grown men that think it terrifying when they loose peripheral vision and only have a single narrow beam to go by. That makes the flood/beam-tradeoff between headlight and primary flashlight into not exactly a "one solution fits all"-kind of thing. I do however think viewing primary headlight and primary flashlight as a pair, is a very good thing. Floody headlight? Consider a throwy flashlight. And the other way around. For first time buyers, probably good not to get too caught up in having the ultimate range. It's all about utility and balance (IMHO anyway). A 1km range light could be cool and all, but cover what you need first, then what you want. Outdoors is also often a group activity, and it's worthwhile to be considerate of the rest of the group as well.