My thoughts and review of the Fenix HL21 LED Headlamp

Manufacturer’s Specifications:

Light source: Cree XP-E LED (R2)
LED lifespan: 50,000 hours
Output: 97 lumens (high); 43 lumens (mid); 3 lumens (low)
Runtimes: 2 hours, 3 minutes (high); 5 hours, 43 minutes (mid); 53 hours (low)
Extra function: SOS
Distance: 93 meters
Intensity: 2158 candela
Impact resistance: 1 meter
Waterproof rating: IPX-8, underwater 2 meters
Dimensions: 2.6 by 1.3 by 1.9 inches / 66 by 33.7 by 48.8 millimeters (LxWxH))
Weight: 41.1 grams (without batteries)
Battery: one 1.5V AA (Ni-MH, Alkaline) battery
Accessories: diffuser lens, spare O-ring