The Nano 6is the smallest torch in the Dive Lantern range and is perfect for putting in a pocket as a backup, attaching to a mask or cray loop. 

It has two light outputs based on the battery that is used.  When run on the USB-C rechargeable battery it comes with the output is 600 lumens with a 75-minute runtime but run on a standard AA battery it drops down to 200 lumens, with an 80-minute runtime. It has a 10-degree beam angle and weighs just 3.2 oz.