I have long used Fenix’s LD01 torch for this purpose, which I now see they have upgraded (the new LD02 model giving approx 20% more light on the brightest setting). It has three settings: 8, 25 and 100 ANSI lumens. The reflector is Loktited on and needs some careful work to unscrew it for the first time. Without the reflector I attach it via a carabiner (1 gram) to the provided keyring and hang the torch from the roof of my tent/shelter with a piece of string where it gives 360 degrees coverage good enough for cooking, conversation etc on the middle setting where one AAA battery will last at least one night. Of course once you are through cooking you can back it off to the lowest setting. It is quite bright enough to light all of a one of the DOC huts in NZ or an circle of over 7 metres radius outdoors if used in this way. You are getting a night’s light (perhaps for a party) for less than 10 grams per night with Eneloops batteries – which is pretty good. You can make a head band for it with a couple of pieces of elastic sewn together or some hat band elastic, two ‘O’ rings and a micro cord lock (2 grams) . I usually use their HL10 for this purpose, preferring to have two separate sources of light for convenience. After all, each of these torches weighs less than 20 grams without any battery: https://fenixlighting.com/product/ld02-fenix-flashlight/ & http://fenixlight.com/ProductMore.aspx?id=75&tid=13&cid=2#.VXDWt0b0ncs
