The fusion company with FLARE

Fusion promises clean, abundant energy. The science has been proven. The challenge now is making it work at commercial scale. FLARE, our two-stage fusion fuel system, is how we get there.

PARTNER WITH FIRST LIGHT

Fusion promises clean, abundant energy. The science has been proven. The challenge now is making it work at commercial scale. FLARE, our two-stage fusion fuel system, is how we get there.

PARTNER WITH FIRST LIGHT

FLARE makes commercial fusion possible

It’s not the fuel. It’s not the machine. It’s the fusion fuel system.

FLARE is First Light’s own fusion fuel system. Rather than asking the fusion machine to do everything, FLARE puts more of the functionality into the fuel system itself. This reduces the demands placed on the machine and creates a simpler route to commercial fusion.

Built on proven capability

Fifteen years of capability sit behind FLARE. First Light has spent that time building deep expertise across fusion physics, simulation, target design, precision manufacturing, diagnostics and experimental validation.

First Light’s approach has been validated externally. At Sandia National Laboratories, we demonstrated target-based power amplification, proving the core idea behind FLARE: that the right fuel system design can materially improve performance.

THE FUSION OPPORTUNITY

“Fusion is tipped to be a $multi-trillion global industry in the second half of the century, and it is at an inflection point in 2026.”*

*Source: 2026 UKAEA roadmap – 2026-2030

OUR STORY

The First Light story

To power a world worth inheriting – that’s why First Light Fusion was founded in 2011.

Our aim has always been to achieve fusion by the simplest means possible.

Commercial fusion will be built in partnership

We’ve built FLARE. We’re looking for partners to build around it.  

Take your testing to our extremes

The capabilities we’ve built for fusion now solve the hardest problems in space, defence and beyond.

News and insights

Follow First Light’s latest progress and thinking

September 28, 2026

From Apprentice Toolmaker to Fusion Energy: Celebrating 50 Years in Engineering

In August 1976, 16-year-old William Martin began work as an apprentice toolmaker. Fifty years later, he is still solving difficult problems, making precision components and learning new skills now as part of the team at First Light Fusion.

September 22, 2026

First Light Fusion achieves major step forward for FLARE - proving key low-cost fusion principle

22nd September 2026 - First Light Fusion has demonstrated the key fuel compression principle underpinning FLARE, its proprietary approach to inertial fusion, in a series of experiments on M3, the company’s in-house pulsed power facility.

September 21, 2026

First Light technician Kate Osborn featured in inspiring new book

First Light technician Kate Osborn featured in Scientists Making a Difference, a new book by Dr Shini Somara created in collaboration with Imperial College London and The Gatsby Charitable Foundation.

Powering a world worth inheriting

If that’s a future you want to help build, we’d love to hear from you.

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