Nautlite ReefMaster 1800

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