Weltool LH6 tactical helmet light head uses a high-density 850nm infrared LED with two modes of high and low, designed for head-mounted night vision device. The LH6 is compatible with Weltool W35, W65 weapon light body, or BB3, BB6 torch body. It is also compatible with Surefire M600DF MH60DF light body or MH62 body. The diameter is 28mm (1.1 inches) and the aluminium alloy is CNC machined. It has a brightness output of 100 mW in high mode, which lasts for 10 hours and 18 minutes. In low mode, it outputs 5 mW and lasts for 59 hours and 54 minutes.