Operating time
1. level: 1300 lm: 10 minutes, then 800 lm: 140 minutes, then 500 lm: 30 minutes, then 150 lm: 110 minutes (steps down)
Level 2: 500 lm: 35 minutes, 150 lm: 130 minutes
Grade 3: 15 lm: 27 hours
Grade 4 15 lm: 318 hours
strobe: none
SOS: none
