If you are looking for one of the farthest-reaching LED flashlights in the world, the Acebeam K75 2.0 longest-throw flashlight might be for you! It throws monstrous 2.5 kilometers (1.5 miles) and has a maximum output of 6300 lumens, which is actually the pinnacle of LED flashlight technology.

Features:

Utilizes one LUMINUS SBT-90-GEN2 LED with extreme performance
Max Output: 6300 lumens
Peak Beam Distance: 2500 meters
Peak Beam Intensity: 1562500cd
Power Source: 4 x 18650 batteries
ECO and POWER mode switch toggles between Everyday and Search-and-Rescue settings
One-handed, one-button for easy and fast operation
Highly efficient constant current circuit design (Non-PWM)
Intelligent temperature controller is used to adjust brightness and prevent overheat
Rear tripod receptacle brings extra functionality
Battery level indicator lights for easy power monitoring
Lockout mode prevents accidental activation
Toughened ultra-clear mineral glass lens with an anti-reflective coating
Integrated Precision Digital Optics Technology provides extreme reflector performance
Sturdy aerospace-grade aluminum body with military grade type III hard-anodized finish
Waterproof: IP68 rating (2 meters submersible)
Impact resistance to 1 meter

Dimensions:
Length: 218mm(8.58")
Head Diameter: 126mm (4.96")
Tube Diameter: 53mm" (2.08")