The Nautilite ReefMaster 1800 is a powerful and rugged underwater torch designed for divers who demand strong output, long burn times and dependable construction. Delivering up to 1800 lumens through a focused narrow beam, it’s ideal for night dives, low-visibility conditions and general underwater exploration.
The ReefMaster 1800 is an excellent choice for recreational divers looking for a high-output, easy-to-use torch with strong build quality and long runtimes — whether used as a primary night-diving light or a powerful backup.
 
Light Output & Modes
White Light: 1800 lumens (High), 1000 lumens (Low)
Burn Time: up to 4 hours (High), up to 6 hours (Low)
Modes: White light and emergency SOS
Beam Angle: 9° narrow beam for excellent penetration
 
Build & Operation
Push-button operation with simple power cycling
Clean, streamlined body with no exposed charging ports during use
 
Durability & Materials 
Machined from 6061-T6 aircraft-grade aluminium alloy
Durable glass lens for repeated underwater use
Black hard-anodised coating for corrosion resistance
Waterproof to 100 metres / 328 ft (IPX-8 rated)
 
Battery, Size & Weight
Battery: 1 × 26650 Li-ion rechargeable battery
Torch Dimensions: Ø 39 mm × 166 mm
Weight: 340 g
 
Battery & Charging Indicators
Battery level indicator:
Green: 100% – 75%
Yellow: 75% – 50%
Red: 50% – 25%
Flashing Red: 25% – 0%
Charging indicator: Red = charging, Green = fully charged
 
What's in the box
Nautilite ReefMaster 1800 Underwater Torch
26650 Lithium-Ion Battery
USB-C Charging Cable
Lanyard
Spare O-ring
User manual