The Sofirn SD11 is a high-performance scuba diving and underwater flashlight built for serious divers, underwater photographers, cave explorers, and night diving. It delivers up to 5000 lumens with a wide 116° beam angle, providing excellent flood illumination for close-to-medium range underwater work.
The SD11 features six high-performance TN3535 LEDs — three 3000K warm white (CRI90) and three 6000K cool white — allowing you to switch between warm, cool, or mixed (~5000K) white light. This 2-CCT flexibility is perfect for natural color rendering in underwater photography and video, or for better water penetration with cooler tones.
It also includes a dedicated 660nm red light (150 lumens) with multiple brightness levels. The red output preserves night vision and is far less likely to startle or disturb marine life during night dives.
Control is handled via a Hall-effect magnetic rotary switch (easy to operate with thick gloves) combined with a central touch button. The light is powered by a removable 26800 7500mAh battery (included) with convenient USB-C charging. Runtime reaches up to 11 hours on lower white light settings.
Built from durable AL6061-T6 aluminum alloy with IPX8 waterproofing (rated to 100 meters submersion) and 1.5 m impact resistance, the SD11 is ready for demanding underwater conditions. It includes a lanyard attachment and a 1/4" threaded mount for tripods or camera rigs.
Clear Runtime & Throw (tested with included 7500mAh 26800 battery):
White Light (2-CCT — Warm / Cool / Mixed):
| Mode | Max Output | Runtime (approx.) | Beam Angle | Notes |
|---|
| Turbo / High | 5000 lm | Step-down + several hours | 116° | Powerful flood |
| Medium | ~1500—2000 lm | Several hours | 116° | Balanced use |
| Low | 300 lm | Up to 11 hours | 116° | Long runtime |
Red Light (660nm):
| Mode | Output | Runtime | Notes |
|---|
| High | 150 lm | Several hours | Night vision / marine friendly |
| Lower levels | Variable | Very long | Multiple brightness steps |
Key Features:
- 5000 lumens max with wide 116° underwater flood beam
- 2-CCT white light (3000K warm CRI90 + 6000K cool) + mixed mode
- 660nm red light (150 lm) — ideal for night diving & marine life
- Hall-effect rotary switch + touch button (glove-friendly)
- Removable 26800 7500mAh battery with USB-C charging
- IPX8 waterproof (100 m diving rated) + 1.5 m impact resistance
- 1/4" tripod/camera mount + lanyard attachment
- Dimensions: 50.5 mm × 155.3 mm, 331 g with battery
What's Included in the Box:
- 1 × Sofirn SD11 Diving Flashlight
- 1 × Removable 26800 7500mAh Battery (pre-installed)
- 1 × USB-C Charging Cable
- 1 × Lanyard
- 2 × Spare O-rings
- User Manual
A versatile and powerful diving light that combines high output, excellent color flexibility, and practical red light in one well-built, glove-friendly package. Perfect for recreational and technical divers. Available at torchsa.com.
