Ammonite LED ONE MKIII

Ammonite LED ONE MKIII

Power of simplicity. the LED ONE has just been significantly upgraded.

The purpose of creating the LED ONE was to guarantee a failsafe backup against any primary light failure situation.

LED ONE offers simple construction, impressive performance, a new ergonomic military-style grip and long burn time.

LED ONE with rugged materials and design is a powerful yet compact backup torch with an impressive

Confidence in excellent performance and reliability

LED ONE's reliability, it's a key feature, stems from its simple but robust construction, materials used, build quality and minimal electronics.

The LED ONE body is machined from a solid piece of Delrin®, an exceptionally rigid and durable construction thermoplastic. The head is made from hard anodised aluminium, which makes it resistant to abrasion and weather factors.

The LED is protected by 6mm tempered and scratch-resistant glass.

LED ONE head is machined with a long thread and is protected with three beefy o-rings.

It guarantees leak tightness for immersion depths up to 200 m and protects the device from accidental water ingress when switching on and off underwater.

High light intensity, very long operation time

LED ONE delivers a tightly focused light beam of high visible cold white light.

LED ONE provides an optimal combination of high light intensity, up to 400 lm, and very long operating time of over 6 hours

The back-up torch utilizes a directly powered 5W LED chip with an outstanding lifetime, lasting more than 100 000 hours of constant burning.

Three easily accessible AA batteries or equivalent rechargeable batteries can be used as the power supply source.

Ergonomics

This incredibly rugged and waterproof backup light is extremely easy to use. The user switches it on and off with just a simple quarter-turn of the head.

LED ONE easily fits in a jacket pocket (max. length - 197 mm, max. width- 41 mm) as well as it can be conveniently attached to the diving harness.

The exterior is now shaped for a firm and easier grip, additionally, it's much simpler to stow the light with a bungee loop.

Last Updated: March 2026