Silva Smini Fly

How much light it gives at full power, for finding your way in the dark. 4: A bit below average.

250 lumens in Max mode (1.5 hours), in the 150-299 band. This is the maker's figure: Silva's Smini Fly page doesn't say the lumens are measured to ANSI FL1.

How long one charge or set of batteries lasts at a level you can walk and cook by. 3: Below average. Fine for some trips, not others.

The 100-lumen Med mode runs 2.5 hours on the built-in 700 mAh battery (maker's figure), the longest mode of 80 lumens or more, in the 2-3.9 h band. Max 250 lumens lasts 1.5 hours; the 10-lumen Min mode runs 20 hours but is under 80 lumens, so it doesn't count.

How much it adds to your pack and your head. 9: Among the best you can buy for this.

Silva lists 38.5 g with the battery and the 3 mm headband (stored as 39 g), under 50 g, so the top band. Ultralight Outdoor Gear lists 39 g. The Ordnance Survey test page gives both 38.5 g and 37.5 g; the band is 5 either way.